diff --git a/package-lock.json b/package-lock.json
index 3d6398d..e7bbc49 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "LicenseRef-JorisJonkers-Proprietary-1.0",
       "dependencies": {
         "yaml": "2.9.1",
-        "zod": "^4.5.4"
+        "zod": "4.5.4"
       },
       "devDependencies": {
         "@eslint/js": "10.0.1",
@@ -28,7 +28,7 @@
         "vitest": "4.1.11"
       },
       "engines": {
-        "node": ">=24"
+        "node": "v26.9.0"
       }
     },
     "node_modules/@babel/code-frame": {
diff --git a/package.json b/package.json
index 26487f9..58d9794 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "license": "LicenseRef-JorisJonkers-Proprietary-1.0",
   "engines": {
-    "node": ">=24"
+    "node": "v26.9.0"
   },
   "files": [
     "docs/adr/",
@@ -68,6 +68,6 @@
   ],
   "dependencies": {
     "yaml": "2.9.1",
-    "zod": "^4.5.4"
+    "zod": "4.5.4"
   }
 }