diff --git a/package.json b/package.json
index 93d6a2d1d17..a75b9abeefc 100644
--- a/package.json
+++ b/package.json
@@ -90,18 +90,18 @@
     "@ckeditor/ckeditor5-ai": "41.3.1",
     "@ckeditor/ckeditor5-case-change": "41.3.1",
     "@ckeditor/ckeditor5-comments": "41.3.1",
-    "@ckeditor/ckeditor5-dev-build-tools": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-bump-year": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-ci": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-dependency-checker": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-docs": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-release-tools": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-stale-bot": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-tests": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-transifex": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-web-crawler": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-build-tools": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-bump-year": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-ci": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-dependency-checker": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-docs": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-release-tools": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-stale-bot": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-tests": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-transifex": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-web-crawler": "^40.0.0",
     "@ckeditor/ckeditor5-document-outline": "41.3.1",
     "@ckeditor/ckeditor5-export-pdf": "41.3.1",
     "@ckeditor/ckeditor5-export-word": "41.3.1",
diff --git a/packages/ckeditor5-adapter-ckfinder/package.json b/packages/ckeditor5-adapter-ckfinder/package.json
index 5e89fc217cd..ac10fcc2c22 100644
--- a/packages/ckeditor5-adapter-ckfinder/package.json
+++ b/packages/ckeditor5-adapter-ckfinder/package.json
@@ -19,7 +19,7 @@
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-heading": "41.3.1",
diff --git a/packages/ckeditor5-alignment/package.json b/packages/ckeditor5-alignment/package.json
index 84c34a194fe..c4192c389df 100644
--- a/packages/ckeditor5-alignment/package.json
+++ b/packages/ckeditor5-alignment/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-autoformat/package.json b/packages/ckeditor5-autoformat/package.json
index 37275e28b47..5bdcf179962 100644
--- a/packages/ckeditor5-autoformat/package.json
+++ b/packages/ckeditor5-autoformat/package.json
@@ -20,7 +20,7 @@
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-autosave/package.json b/packages/ckeditor5-autosave/package.json
index 807d783f75b..faeff6270ff 100644
--- a/packages/ckeditor5-autosave/package.json
+++ b/packages/ckeditor5-autosave/package.json
@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-paragraph": "41.3.1",
     "@ckeditor/ckeditor5-source-editing": "41.3.1",
diff --git a/packages/ckeditor5-basic-styles/package.json b/packages/ckeditor5-basic-styles/package.json
index a94a42440d7..d786703bbf6 100644
--- a/packages/ckeditor5-basic-styles/package.json
+++ b/packages/ckeditor5-basic-styles/package.json
@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-essentials": "41.3.1",
diff --git a/packages/ckeditor5-block-quote/package.json b/packages/ckeditor5-block-quote/package.json
index 663b8f50d76..6f1eb7c76a0 100644
--- a/packages/ckeditor5-block-quote/package.json
+++ b/packages/ckeditor5-block-quote/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-build-balloon-block/package.json b/packages/ckeditor5-build-balloon-block/package.json
index 5b138415b17..54fa908c4f5 100644
--- a/packages/ckeditor5-build-balloon-block/package.json
+++ b/packages/ckeditor5-build-balloon-block/package.json
@@ -52,8 +52,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-build-balloon/package.json b/packages/ckeditor5-build-balloon/package.json
index fc5ecd0b572..71bde376878 100644
--- a/packages/ckeditor5-build-balloon/package.json
+++ b/packages/ckeditor5-build-balloon/package.json
@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-build-classic/package.json b/packages/ckeditor5-build-classic/package.json
index 65507332773..5ee1911c97f 100644
--- a/packages/ckeditor5-build-classic/package.json
+++ b/packages/ckeditor5-build-classic/package.json
@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-build-decoupled-document/package.json b/packages/ckeditor5-build-decoupled-document/package.json
index 6c3a8cb5ec5..6ade38036a7 100644
--- a/packages/ckeditor5-build-decoupled-document/package.json
+++ b/packages/ckeditor5-build-decoupled-document/package.json
@@ -53,8 +53,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-build-inline/package.json b/packages/ckeditor5-build-inline/package.json
index ccefb67f58f..9a939b81c87 100644
--- a/packages/ckeditor5-build-inline/package.json
+++ b/packages/ckeditor5-build-inline/package.json
@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-build-multi-root/package.json b/packages/ckeditor5-build-multi-root/package.json
index 6f1178a57fc..291e5fb55a6 100644
--- a/packages/ckeditor5-build-multi-root/package.json
+++ b/packages/ckeditor5-build-multi-root/package.json
@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-translations": "^39.7.0",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-translations": "^40.0.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "terser-webpack-plugin": "^4.2.3",
     "typescript": "5.0.4",
diff --git a/packages/ckeditor5-ckbox/package.json b/packages/ckeditor5-ckbox/package.json
index 147a3d7d0a0..8517405c01f 100644
--- a/packages/ckeditor5-ckbox/package.json
+++ b/packages/ckeditor5-ckbox/package.json
@@ -23,7 +23,7 @@
     "@ckeditor/ckeditor5-core": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-essentials": "41.3.1",
diff --git a/packages/ckeditor5-ckfinder/package.json b/packages/ckeditor5-ckfinder/package.json
index ca9994588c8..40445baea82 100644
--- a/packages/ckeditor5-ckfinder/package.json
+++ b/packages/ckeditor5-ckfinder/package.json
@@ -19,7 +19,7 @@
     "@ckeditor/ckeditor5-adapter-ckfinder": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-image": "41.3.1",
diff --git a/packages/ckeditor5-cloud-services/package.json b/packages/ckeditor5-cloud-services/package.json
index 3a28dffdef8..a035d740c1f 100644
--- a/packages/ckeditor5-cloud-services/package.json
+++ b/packages/ckeditor5-cloud-services/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-theme-lark": "41.3.1",
     "@ckeditor/ckeditor5-utils": "41.3.1",
diff --git a/packages/ckeditor5-code-block/package.json b/packages/ckeditor5-code-block/package.json
index a0c90ef46a8..090bb044e7f 100644
--- a/packages/ckeditor5-code-block/package.json
+++ b/packages/ckeditor5-code-block/package.json
@@ -23,7 +23,7 @@
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-easy-image/package.json b/packages/ckeditor5-easy-image/package.json
index 1ae09cd8ee5..3ba809b2109 100644
--- a/packages/ckeditor5-easy-image/package.json
+++ b/packages/ckeditor5-easy-image/package.json
@@ -19,7 +19,7 @@
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-image": "41.3.1",
     "@ckeditor/ckeditor5-paragraph": "41.3.1",
diff --git a/packages/ckeditor5-editor-balloon/package.json b/packages/ckeditor5-editor-balloon/package.json
index d9958cb7b6f..36941726533 100644
--- a/packages/ckeditor5-editor-balloon/package.json
+++ b/packages/ckeditor5-editor-balloon/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-heading": "41.3.1",
diff --git a/packages/ckeditor5-editor-classic/package.json b/packages/ckeditor5-editor-classic/package.json
index a0897ca5edd..ca005c0f522 100644
--- a/packages/ckeditor5-editor-classic/package.json
+++ b/packages/ckeditor5-editor-classic/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-heading": "41.3.1",
diff --git a/packages/ckeditor5-editor-decoupled/package.json b/packages/ckeditor5-editor-decoupled/package.json
index c7f2a3f62f7..06204325579 100644
--- a/packages/ckeditor5-editor-decoupled/package.json
+++ b/packages/ckeditor5-editor-decoupled/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-heading": "41.3.1",
diff --git a/packages/ckeditor5-editor-inline/package.json b/packages/ckeditor5-editor-inline/package.json
index d918c63cbc3..dde89316182 100644
--- a/packages/ckeditor5-editor-inline/package.json
+++ b/packages/ckeditor5-editor-inline/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-heading": "41.3.1",
diff --git a/packages/ckeditor5-editor-multi-root/package.json b/packages/ckeditor5-editor-multi-root/package.json
index b142429af82..adfd9dd7959 100644
--- a/packages/ckeditor5-editor-multi-root/package.json
+++ b/packages/ckeditor5-editor-multi-root/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-essentials": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-essentials/package.json b/packages/ckeditor5-essentials/package.json
index 64cd598ad33..73cf6baa584 100644
--- a/packages/ckeditor5-essentials/package.json
+++ b/packages/ckeditor5-essentials/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
     "@ckeditor/ckeditor5-paragraph": "41.3.1",
diff --git a/packages/ckeditor5-find-and-replace/package.json b/packages/ckeditor5-find-and-replace/package.json
index 4d768276d18..0e6604dc20c 100644
--- a/packages/ckeditor5-find-and-replace/package.json
+++ b/packages/ckeditor5-find-and-replace/package.json
@@ -18,7 +18,7 @@
     "lodash-es": "4.17.21"
   },
   "devDependencies": {
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
diff --git a/packages/ckeditor5-font/package.json b/packages/ckeditor5-font/package.json
index 10892ef2fae..d0a60fc761a 100644
--- a/packages/ckeditor5-font/package.json
+++ b/packages/ckeditor5-font/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-undo": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-highlight": "41.3.1",
diff --git a/packages/ckeditor5-heading/package.json b/packages/ckeditor5-heading/package.json
index 6047502b2f1..7c1e764c90e 100644
--- a/packages/ckeditor5-heading/package.json
+++ b/packages/ckeditor5-heading/package.json
@@ -21,7 +21,7 @@
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-editor-multi-root": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-highlight/package.json b/packages/ckeditor5-highlight/package.json
index 69fe422c82b..b9c6945b477 100644
--- a/packages/ckeditor5-highlight/package.json
+++ b/packages/ckeditor5-highlight/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-horizontal-line/package.json b/packages/ckeditor5-horizontal-line/package.json
index 715d9a9a315..fb1fc3595a8 100644
--- a/packages/ckeditor5-horizontal-line/package.json
+++ b/packages/ckeditor5-horizontal-line/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-html-embed/package.json b/packages/ckeditor5-html-embed/package.json
index 05c347bbe8f..0efa4318439 100644
--- a/packages/ckeditor5-html-embed/package.json
+++ b/packages/ckeditor5-html-embed/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-html-support/package.json b/packages/ckeditor5-html-support/package.json
index 0eaf67504c3..b0eb5a8d6a8 100644
--- a/packages/ckeditor5-html-support/package.json
+++ b/packages/ckeditor5-html-support/package.json
@@ -28,7 +28,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-editor-multi-root": "41.3.1",
diff --git a/packages/ckeditor5-image/package.json b/packages/ckeditor5-image/package.json
index 4725b861969..b2bf0c57ac4 100644
--- a/packages/ckeditor5-image/package.json
+++ b/packages/ckeditor5-image/package.json
@@ -26,7 +26,7 @@
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-indent/package.json b/packages/ckeditor5-indent/package.json
index ebe61bfd07e..4aaa698bd82 100644
--- a/packages/ckeditor5-indent/package.json
+++ b/packages/ckeditor5-indent/package.json
@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-list": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-language/package.json b/packages/ckeditor5-language/package.json
index ca88a6561e3..d47be818855 100644
--- a/packages/ckeditor5-language/package.json
+++ b/packages/ckeditor5-language/package.json
@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-paragraph": "41.3.1",
diff --git a/packages/ckeditor5-link/package.json b/packages/ckeditor5-link/package.json
index 64eeef98ad7..e2ebbeab168 100644
--- a/packages/ckeditor5-link/package.json
+++ b/packages/ckeditor5-link/package.json
@@ -24,7 +24,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-list/package.json b/packages/ckeditor5-list/package.json
index 18b8399e9f9..af340720e18 100644
--- a/packages/ckeditor5-list/package.json
+++ b/packages/ckeditor5-list/package.json
@@ -24,7 +24,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-markdown-gfm/package.json b/packages/ckeditor5-markdown-gfm/package.json
index bc7293a4353..1a18b1f3a03 100644
--- a/packages/ckeditor5-markdown-gfm/package.json
+++ b/packages/ckeditor5-markdown-gfm/package.json
@@ -25,7 +25,7 @@
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-essentials": "41.3.1",
diff --git a/packages/ckeditor5-media-embed/package.json b/packages/ckeditor5-media-embed/package.json
index f57beda4622..6467ba64f2f 100644
--- a/packages/ckeditor5-media-embed/package.json
+++ b/packages/ckeditor5-media-embed/package.json
@@ -20,7 +20,7 @@
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-balloon": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-mention/package.json b/packages/ckeditor5-mention/package.json
index 18aa34cd053..0c51259203a 100644
--- a/packages/ckeditor5-mention/package.json
+++ b/packages/ckeditor5-mention/package.json
@@ -22,7 +22,7 @@
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-font": "41.3.1",
diff --git a/packages/ckeditor5-minimap/package.json b/packages/ckeditor5-minimap/package.json
index f80d6939875..c873fadb29b 100644
--- a/packages/ckeditor5-minimap/package.json
+++ b/packages/ckeditor5-minimap/package.json
@@ -21,7 +21,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-decoupled": "41.3.1",
     "@ckeditor/ckeditor5-font": "41.3.1",
diff --git a/packages/ckeditor5-page-break/package.json b/packages/ckeditor5-page-break/package.json
index 165e954bbf2..412069b2151 100644
--- a/packages/ckeditor5-page-break/package.json
+++ b/packages/ckeditor5-page-break/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-paste-from-office/package.json b/packages/ckeditor5-paste-from-office/package.json
index 8c9ade47f9c..c64c0f86e80 100644
--- a/packages/ckeditor5-paste-from-office/package.json
+++ b/packages/ckeditor5-paste-from-office/package.json
@@ -21,7 +21,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
diff --git a/packages/ckeditor5-remove-format/package.json b/packages/ckeditor5-remove-format/package.json
index 4754d71ed43..556512225d4 100644
--- a/packages/ckeditor5-remove-format/package.json
+++ b/packages/ckeditor5-remove-format/package.json
@@ -19,7 +19,7 @@
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-enter": "41.3.1",
diff --git a/packages/ckeditor5-restricted-editing/package.json b/packages/ckeditor5-restricted-editing/package.json
index 2cfd822aece..f3340193aa3 100644
--- a/packages/ckeditor5-restricted-editing/package.json
+++ b/packages/ckeditor5-restricted-editing/package.json
@@ -20,7 +20,7 @@
     "@ckeditor/ckeditor5-clipboard": "41.3.1",
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-show-blocks/package.json b/packages/ckeditor5-show-blocks/package.json
index 8f050ba3679..3b98536808e 100644
--- a/packages/ckeditor5-show-blocks/package.json
+++ b/packages/ckeditor5-show-blocks/package.json
@@ -17,7 +17,7 @@
     "@ckeditor/ckeditor5-ui": "41.3.1"
   },
   "devDependencies": {
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-editor-balloon": "41.3.1",
     "@ckeditor/ckeditor5-editor-decoupled": "41.3.1",
diff --git a/packages/ckeditor5-source-editing/package.json b/packages/ckeditor5-source-editing/package.json
index 3f341034167..17a90a4a5a3 100644
--- a/packages/ckeditor5-source-editing/package.json
+++ b/packages/ckeditor5-source-editing/package.json
@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
     "@ckeditor/ckeditor5-essentials": "41.3.1",
diff --git a/packages/ckeditor5-special-characters/package.json b/packages/ckeditor5-special-characters/package.json
index 4968df3f59b..ae2de4051a2 100644
--- a/packages/ckeditor5-special-characters/package.json
+++ b/packages/ckeditor5-special-characters/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-image": "41.3.1",
diff --git a/packages/ckeditor5-style/package.json b/packages/ckeditor5-style/package.json
index 814b55ac493..4c2ee4e328e 100644
--- a/packages/ckeditor5-style/package.json
+++ b/packages/ckeditor5-style/package.json
@@ -24,7 +24,7 @@
     "@ckeditor/ckeditor5-cloud-services": "41.3.1",
     "@ckeditor/ckeditor5-code-block": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-easy-image": "41.3.1",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-table/package.json b/packages/ckeditor5-table/package.json
index 15f5f314fc5..6923d27462d 100644
--- a/packages/ckeditor5-table/package.json
+++ b/packages/ckeditor5-table/package.json
@@ -22,7 +22,7 @@
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-editor-multi-root": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/packages/ckeditor5-ui/src/panel/balloon/balloonpanelview.ts b/packages/ckeditor5-ui/src/panel/balloon/balloonpanelview.ts
index 193afc09da0..6e045297c0f 100644
--- a/packages/ckeditor5-ui/src/panel/balloon/balloonpanelview.ts
+++ b/packages/ckeditor5-ui/src/panel/balloon/balloonpanelview.ts
@@ -26,6 +26,10 @@ import {
 import { isElement } from 'lodash-es';
 import '../../../theme/components/panel/balloonpanel.css';
 
+const ARROW_SIDE_OFFSET = 25;
+const ARROW_HEIGHT_OFFSET = 10;
+const STICKY_VERTICAL_OFFSET = 20;
+
 const toPx = toUnit( 'px' );
 const defaultLimiterElement = global.document.body;
 
@@ -416,7 +420,7 @@ export default class BalloonPanelView extends View {
 	 *
 	 * @default 25
 	 */
-	public static arrowSideOffset = 25;
+	public static arrowSideOffset = ARROW_SIDE_OFFSET;
 
 	/**
 	 * A height offset of the arrow from the edge of the balloon. Controlled by CSS.
@@ -448,7 +452,7 @@ export default class BalloonPanelView extends View {
 	 *
 	 * @default 10
 	*/
-	public static arrowHeightOffset = 10;
+	public static arrowHeightOffset = ARROW_HEIGHT_OFFSET;
 
 	/**
 	 * A vertical offset of the balloon panel from the edge of the viewport if sticky.
@@ -473,7 +477,7 @@ export default class BalloonPanelView extends View {
 	 *
 	 * @default 20
 	 */
-	public static stickyVerticalOffset = 20;
+	public static stickyVerticalOffset = STICKY_VERTICAL_OFFSET;
 
 	/**
 	 * Function used to calculate the optimal position for the balloon.
@@ -899,9 +903,9 @@ export function generatePositions( options: {
 	config?: object;
 } = {} ): Record<string, PositioningFunction> {
 	const {
-		sideOffset = BalloonPanelView.arrowSideOffset,
-		heightOffset = BalloonPanelView.arrowHeightOffset,
-		stickyVerticalOffset = BalloonPanelView.stickyVerticalOffset,
+		sideOffset = ARROW_SIDE_OFFSET,
+		heightOffset = ARROW_HEIGHT_OFFSET,
+		stickyVerticalOffset = STICKY_VERTICAL_OFFSET,
 		config
 	} = options;
 
diff --git a/packages/ckeditor5-ui/src/view.ts b/packages/ckeditor5-ui/src/view.ts
index 94bea2e5d09..1dca803b171 100644
--- a/packages/ckeditor5-ui/src/view.ts
+++ b/packages/ckeditor5-ui/src/view.ts
@@ -161,7 +161,7 @@ export default class View<TElement extends HTMLElement = HTMLElement>
 	 */
 	public template?: Template;
 
-	public viewUid?: string;
+	public declare viewUid?: string;
 
 	/**
 	 * Collections registered with {@link #createCollection}.
diff --git a/packages/ckeditor5-ui/src/viewcollection.ts b/packages/ckeditor5-ui/src/viewcollection.ts
index dd6b4dab90d..1001680f92c 100644
--- a/packages/ckeditor5-ui/src/viewcollection.ts
+++ b/packages/ckeditor5-ui/src/viewcollection.ts
@@ -58,7 +58,7 @@ import type View from './view.js';
  * of a {@link module:ui/template~Template template}.
  */
 export default class ViewCollection<TView extends View = View> extends Collection<TView> {
-	public id?: string;
+	public declare id?: string;
 
 	/**
 	 * A parent element within which child views are rendered and managed in DOM.
diff --git a/packages/ckeditor5-upload/src/filerepository.ts b/packages/ckeditor5-upload/src/filerepository.ts
index 9de93cf5ad6..10b82b95128 100644
--- a/packages/ckeditor5-upload/src/filerepository.ts
+++ b/packages/ckeditor5-upload/src/filerepository.ts
@@ -52,7 +52,7 @@ export default class FileRepository extends Plugin {
 	 *
 	 * For more information and example see {@link module:upload/filerepository~UploadAdapter}.
 	 */
-	public createUploadAdapter?: ( loader: FileLoader ) => UploadAdapter;
+	public declare createUploadAdapter?: ( loader: FileLoader ) => UploadAdapter;
 
 	/**
 	 * Loaders mappings used to retrieve loaders references.
diff --git a/packages/ckeditor5-utils/src/emittermixin.ts b/packages/ckeditor5-utils/src/emittermixin.ts
index 61669ab2cf7..941f4a00442 100644
--- a/packages/ckeditor5-utils/src/emittermixin.ts
+++ b/packages/ckeditor5-utils/src/emittermixin.ts
@@ -355,18 +355,18 @@ export default function EmitterMixin( base?: Constructor ): unknown {
 			}
 		}
 
-		public _events?: { [ eventName: string ]: EventNode };
+		public declare _events?: { [ eventName: string ]: EventNode };
 
-		public [ _emitterId ]?: string;
+		public declare [ _emitterId ]?: string;
 
-		public [ _listeningTo ]?: {
+		public declare [ _listeningTo ]?: {
 			[ emitterId: string ]: {
 				emitter: Emitter;
 				callbacks: { [ event: string]: Array<Function> };
 			};
 		};
 
-		public [ _delegations ]?: Map<string, Map<Emitter, string | ( ( name: string ) => string ) | undefined>>;
+		public declare [ _delegations ]?: Map<string, Map<Emitter, string | ( ( name: string ) => string ) | undefined>>;
 	}
 
 	return Mixin;
diff --git a/packages/ckeditor5-word-count/package.json b/packages/ckeditor5-word-count/package.json
index df4389dab4c..ee513c6fbf8 100644
--- a/packages/ckeditor5-word-count/package.json
+++ b/packages/ckeditor5-word-count/package.json
@@ -20,7 +20,7 @@
     "@ckeditor/ckeditor5-basic-styles": "41.3.1",
     "@ckeditor/ckeditor5-block-quote": "41.3.1",
     "@ckeditor/ckeditor5-core": "41.3.1",
-    "@ckeditor/ckeditor5-dev-utils": "^39.7.0",
+    "@ckeditor/ckeditor5-dev-utils": "^40.0.0",
     "@ckeditor/ckeditor5-editor-classic": "41.3.1",
     "@ckeditor/ckeditor5-editor-multi-root": "41.3.1",
     "@ckeditor/ckeditor5-engine": "41.3.1",
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 2132b742ed6..0fcfdb17e02 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -15,6 +15,7 @@
     "noEmitOnError": false
   },
   "include": [
+    "**/*.ts",
     "./typings/",
     "./packages/*/src/augmentation.ts",
     "./external/ckeditor5-commercial/packages/*/src/augmentation.ts"