diff --git a/package.json b/package.json
index e7a0334..af6f433 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "json-schema-to-zod": "^2.6.1",
     "lodash": "^4.17.21",
     "openapi-types": "^12.1.3",
-    "zod": "^3.25.56"
+    "zod": "^4.1.8"
   },
   "devDependencies": {
     "@cloudventure/jest-transformer-esbuild": "^1.0.15",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bc3e4f1..e76f753 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -72,8 +72,8 @@ importers:
         specifier: ^12.1.3
         version: 12.1.3
       zod:
-        specifier: ^3.25.56
-        version: 3.25.56
+        specifier: ^4.1.8
+        version: 4.1.8
     devDependencies:
       '@cloudventure/jest-transformer-esbuild':
         specifier: ^1.0.15
@@ -3654,8 +3654,8 @@ packages:
   zod@3.24.4:
     resolution: {integrity: sha512-OdqJE9UDRPwWsrHjLN2F8bPxvwJBK22EHLWtanu0LSYr5YqzsaaW3RMgmjwr8Rypg5k+meEJdSPXJZXE/yqOMg==}
 
-  zod@3.25.56:
-    resolution: {integrity: sha512-rd6eEF3BTNvQnR2e2wwolfTmUTnp70aUTqr0oaGbHifzC3BKJsoV+Gat8vxUMR1hwOKBs6El+qWehrHbCpW6SQ==}
+  zod@4.1.8:
+    resolution: {integrity: sha512-5R1P+WwQqmmMIEACyzSvo4JXHY5WiAFHRMg+zBZKgKS+Q1viRa0C1hmUKtHltoIFKtIdki3pRxkmpP74jnNYHQ==}
 
 snapshots:
 
@@ -7953,4 +7953,4 @@ snapshots:
 
   zod@3.24.4: {}
 
-  zod@3.25.56: {}
+  zod@4.1.8: {}