diff --git a/package-lock.json b/package-lock.json
index af77956..e821fc8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "specmatic",
-  "version": "2.39.3",
+  "version": "2.43.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "specmatic",
-      "version": "2.39.3",
+      "version": "2.43.0",
       "license": "MIT",
       "dependencies": {
         "fast-xml-parser": "^5.0.0",
@@ -35,7 +35,7 @@
         "jest": "^30.0.0",
         "jest-extended": "^7.0.0",
         "jest-mock-extended": "^4.0.0",
-        "jest-when": "^3.6.0",
+        "jest-when": "^4.0.0",
         "rimraf": "^6.0.1",
         "supertest": "^7.0.0",
         "typescript": "^5.6.2"
@@ -102,7 +102,6 @@
       "integrity": "sha512-CGOfOJqWjg2qW/Mb6zNsDm+u5vFQ8DxXfbM09z69p5Z6+mE1ikP2jUXw+j42Pf1XTYED2Rni5f95npYeuwMDQA==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.29.0",
         "@babel/generator": "^7.29.0",
@@ -2231,7 +2230,6 @@
       "integrity": "sha512-b63wmnKPaK+6ZZfpYhz9K61oybvbI1aMcIs80++JI1O1rR1vaxHUCNqo3ITu6NU0d4V34yZFoHMn/uoKr/Rwfw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@jest/environment": "30.2.0",
         "@jest/expect": "30.2.0",
@@ -3594,7 +3592,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.9.0",
         "caniuse-lite": "^1.0.30001759",
@@ -5252,7 +5249,6 @@
       "integrity": "sha512-F26gjC0yWN8uAA5m5Ss8ZQf5nDHWGlN/xWZIh8S5SRbsEKBovwZhxGd6LJlbZYxBgCYOtreSUyb8hpXyGC5O4A==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@jest/core": "30.2.0",
         "@jest/types": "30.2.0",
@@ -6007,13 +6003,16 @@
       }
     },
     "node_modules/jest-when": {
-      "version": "3.7.0",
-      "resolved": "https://registry.npmjs.org/jest-when/-/jest-when-3.7.0.tgz",
-      "integrity": "sha512-aLbiyxmtksijcrKFir7n+t+XPbqSLV01eDkRyX28WM4VgA/iSc3mG8R8O2evDtOAa6SefrJiTIt/rTqqyrwVZg==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/jest-when/-/jest-when-4.0.0.tgz",
+      "integrity": "sha512-Y1UrHYyJYPSZ/H1d/mYQhrF2BICZbS/IkRzt4+lsuXEZDXRGS+GCIBowfzKqG8El47lxwuI6KdSQU3wW1owpmg==",
       "dev": true,
       "license": "MIT",
+      "workspaces": [
+        "compat/jest27"
+      ],
       "peerDependencies": {
-        "jest": ">= 25"
+        "jest": ">= 27"
       }
     },
     "node_modules/jest-worker": {
@@ -7806,7 +7805,6 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/package.json b/package.json
index c238bbd..845bdb4 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "jest": "^30.0.0",
     "jest-extended": "^7.0.0",
     "jest-mock-extended": "^4.0.0",
-    "jest-when": "^3.6.0",
+    "jest-when": "^4.0.0",
     "rimraf": "^6.0.1",
     "supertest": "^7.0.0",
     "typescript": "^5.6.2"