diff --git a/package-lock.json b/package-lock.json
index 00b15ba5..a3868e06 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,9 +9,9 @@
             "version": "3.23.5",
             "license": "Apache-2.0",
             "dependencies": {
-                "@accordproject/concerto-core": "3.19.1",
-                "@accordproject/concerto-util": "3.19.1",
-                "@accordproject/concerto-vocabulary": "3.19.1",
+                "@accordproject/concerto-core": "3.19.0",
+                "@accordproject/concerto-util": "3.18.1",
+                "@accordproject/concerto-vocabulary": "3.18.1",
                 "@openapi-contrib/openapi-schema-to-json-schema": "5.1.0",
                 "ajv": "8.13.0",
                 "ajv-formats": "3.0.1",
@@ -22,7 +22,7 @@
                 "pluralize": "8.0.0"
             },
             "devDependencies": {
-                "@accordproject/concerto-cto": "3.19.1",
+                "@accordproject/concerto-cto": "3.18.1",
                 "@babel/preset-env": "7.16.11",
                 "babel-loader": "8.2.3",
                 "chai": "4.3.6",
@@ -61,13 +61,14 @@
             }
         },
         "node_modules/@accordproject/concerto-core": {
-            "version": "3.19.1",
-            "resolved": "https://registry.npmjs.org/@accordproject/concerto-core/-/concerto-core-3.19.1.tgz",
-            "integrity": "sha512-mN4sv+zznI8zrPSzk5jpSKFG43r4sx5n7zGqjJLXsWtzjTZ/Q9cYOlJhF0mVBuL/R3MQxX8iMkR3yvI+YB4W7A==",
+            "version": "3.19.0",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-core/-/concerto-core-3.19.0.tgz",
+            "integrity": "sha512-zgAV8s5e+I4wGJjYeQkYl/5c3/Ew8ZbQWunbICu2obtoW4xmvPJ7gWBRg2n3lrsCYuEde7eMT8tRZ8Kcgwuh7w==",
+            "license": "Apache-2.0",
             "dependencies": {
-                "@accordproject/concerto-cto": "3.19.1",
+                "@accordproject/concerto-cto": "3.19.0",
                 "@accordproject/concerto-metamodel": "3.10.0",
-                "@accordproject/concerto-util": "3.19.1",
+                "@accordproject/concerto-util": "3.19.0",
                 "dayjs": "1.11.10",
                 "debug": "4.3.4",
                 "lorem-ipsum": "2.0.8",
@@ -82,13 +83,47 @@
                 "npm": ">=8"
             }
         },
+        "node_modules/@accordproject/concerto-core/node_modules/@accordproject/concerto-cto": {
+            "version": "3.19.0",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-cto/-/concerto-cto-3.19.0.tgz",
+            "integrity": "sha512-eA8O2IcEmnOdGTu2bWeSFQMSSHQr7vJ/Gzhv0cWxnh41wxKhmfoBK/BmEZgyJi6dI7HufKkat+p2B76MIwCqOA==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "@accordproject/concerto-metamodel": "3.10.0",
+                "@accordproject/concerto-util": "3.19.0",
+                "path-browserify": "1.0.1"
+            },
+            "engines": {
+                "node": ">=16",
+                "npm": ">=8"
+            }
+        },
+        "node_modules/@accordproject/concerto-core/node_modules/@accordproject/concerto-util": {
+            "version": "3.19.0",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-util/-/concerto-util-3.19.0.tgz",
+            "integrity": "sha512-zadhEhKoVDuRcmUZGH5xbgV2Am1zv8jMPJaedWadiSyqw2qif95MZvKg7DEIdSohQvcfJ5z53iPJqsdmfauJAA==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "@supercharge/promise-pool": "1.7.0",
+                "axios": "1.6.8",
+                "colors": "1.4.0",
+                "debug": "4.3.4",
+                "json-colorizer": "2.2.2",
+                "slash": "3.0.0"
+            },
+            "engines": {
+                "node": ">=16",
+                "npm": ">=8"
+            }
+        },
         "node_modules/@accordproject/concerto-cto": {
-            "version": "3.19.1",
-            "resolved": "https://registry.npmjs.org/@accordproject/concerto-cto/-/concerto-cto-3.19.1.tgz",
-            "integrity": "sha512-GfJsyrwNB1JhctMVwrxKJC5Ga3t24H9NrgEaK+BG+wxD5rih6JiI9H5dQBGXS9cQYymmuWeX+Me+vgWfwpJx4A==",
+            "version": "3.18.1",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-cto/-/concerto-cto-3.18.1.tgz",
+            "integrity": "sha512-TqX5C5ZeOjlr3b9ErGVwO3TzkPtKxi+rho5KxcWNVxyWwucUSM5sRLY1+lJOgvX12L1sNlnmsMu/549V//NoSw==",
+            "dev": true,
             "dependencies": {
                 "@accordproject/concerto-metamodel": "3.10.0",
-                "@accordproject/concerto-util": "3.19.1",
+                "@accordproject/concerto-util": "3.18.1",
                 "path-browserify": "1.0.1"
             },
             "engines": {
@@ -127,12 +162,12 @@
             }
         },
         "node_modules/@accordproject/concerto-util": {
-            "version": "3.19.1",
-            "resolved": "https://registry.npmjs.org/@accordproject/concerto-util/-/concerto-util-3.19.1.tgz",
-            "integrity": "sha512-Cp3XKjoE5+yRzyJDL/ycMBfAtMjEd5B0GJAPt72/tNAO2TDUFBexyjrUhpVjUWhHRVxQMFKuXQfgG6WMaL7g/A==",
+            "version": "3.18.1",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-util/-/concerto-util-3.18.1.tgz",
+            "integrity": "sha512-xGXdHTzF7jxvXOfGLtRgxfKAkmhl68uxrs7gYJa58+QuZNT43q+cqvzyF2H619rMHbfqgPzzB/cAb1e3J9IgIA==",
             "dependencies": {
                 "@supercharge/promise-pool": "1.7.0",
-                "axios": "1.7.4",
+                "axios": "1.6.8",
                 "colors": "1.4.0",
                 "debug": "4.3.4",
                 "json-colorizer": "2.2.2",
@@ -143,20 +178,10 @@
                 "npm": ">=8"
             }
         },
-        "node_modules/@accordproject/concerto-util/node_modules/axios": {
-            "version": "1.7.4",
-            "resolved": "https://registry.npmjs.org/axios/-/axios-1.7.4.tgz",
-            "integrity": "sha512-DukmaFRnY6AzAALSH4J2M3k6PkaC+MfaAGdEERRWcC9q3/TWQwLpHR8ZRLKTdQ3aBDL64EdluRDjJqKw+BPZEw==",
-            "dependencies": {
-                "follow-redirects": "^1.15.6",
-                "form-data": "^4.0.0",
-                "proxy-from-env": "^1.1.0"
-            }
-        },
         "node_modules/@accordproject/concerto-vocabulary": {
-            "version": "3.19.1",
-            "resolved": "https://registry.npmjs.org/@accordproject/concerto-vocabulary/-/concerto-vocabulary-3.19.1.tgz",
-            "integrity": "sha512-SGMPzayhJ7yUk5AG37JhQ4v258QZY+yJLK+aM4QsCUkOVRf7Mtwtns1JoseDs3MPSkFIFZ5OA3IVPCkf+1X1aA==",
+            "version": "3.18.1",
+            "resolved": "https://registry.npmjs.org/@accordproject/concerto-vocabulary/-/concerto-vocabulary-3.18.1.tgz",
+            "integrity": "sha512-BWfnPErg5wU3QR7RU5cnJxA23V74BeXUWr3xavi9/YFgIZHZrqSjcHelrJObhwGW6QWek/eLjPiHYhlM+x9xMQ==",
             "dependencies": {
                 "@accordproject/concerto-metamodel": "3.10.0",
                 "yaml": "2.2.2"
diff --git a/package.json b/package.json
index 2a24210a..914b1c3e 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "author": "accordproject.org",
     "license": "Apache-2.0",
     "devDependencies": {
-        "@accordproject/concerto-cto": "3.19.1",
+        "@accordproject/concerto-cto": "3.18.1",
         "@babel/preset-env": "7.16.11",
         "babel-loader": "8.2.3",
         "chai": "4.3.6",
@@ -70,9 +70,9 @@
         "webpack-cli": "4.9.1"
     },
     "dependencies": {
-        "@accordproject/concerto-core": "3.19.1",
-        "@accordproject/concerto-util": "3.19.1",
-        "@accordproject/concerto-vocabulary": "3.19.1",
+        "@accordproject/concerto-core": "3.19.0",
+        "@accordproject/concerto-util": "3.18.1",
+        "@accordproject/concerto-vocabulary": "3.18.1",
         "@openapi-contrib/openapi-schema-to-json-schema": "5.1.0",
         "ajv": "8.13.0",
         "ajv-formats": "3.0.1",