diff --git a/direflow/package.json b/direflow/package.json
index 0aad9111..f0174578 100644
--- a/direflow/package.json
+++ b/direflow/package.json
@@ -65,7 +65,7 @@
     "react-app-rewired": "2.2.1",
     "react-test-renderer": "18.2.0",
     "to-string-loader": "1.2.0",
-    "typescript": "5.1.6",
+    "typescript": "5.5.3",
     "webpack-cli": "5.1.4",
     "ts-loader": "9.4.4"
   },
diff --git a/lit-element/package-lock.json b/lit-element/package-lock.json
index 5838c57c..b5c19c57 100644
--- a/lit-element/package-lock.json
+++ b/lit-element/package-lock.json
@@ -12,7 +12,7 @@
         "@webcomponents/webcomponentsjs": "2.8.0",
         "lit-element": "3.3.3",
         "rollup": "3.28.1",
-        "typescript": "5.1.6"
+        "typescript": "5.5.3"
       }
     },
     "node_modules/@lit-labs/ssr-dom-shim": {
@@ -93,10 +93,11 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.1.6",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.1.6.tgz",
-      "integrity": "sha512-zaWCozRZ6DLEWAWFrVDz1H6FVXzUSfTy5FUMWsQlU8Ym5JP9eO4xkTIROFCQvhQf61z6O/G6ugw3SgAnvvm+HA==",
+      "version": "5.5.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.3.tgz",
+      "integrity": "sha512-/hreyEujaB0w76zKo6717l3L0o/qEUtRgdvUBvlkhoWeOVMjMuHNHk0BRBzikzuGDqNmPQbg5ifMEqsHLiIUcQ==",
       "dev": true,
+      "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/lit-element/package.json b/lit-element/package.json
index 29ef397c..8b684804 100644
--- a/lit-element/package.json
+++ b/lit-element/package.json
@@ -29,6 +29,6 @@
     "@webcomponents/webcomponentsjs": "2.8.0",
     "lit-element": "3.3.3",
     "rollup": "3.28.1",
-    "typescript": "5.1.6"
+    "typescript": "5.5.3"
   }
 }