diff --git a/package.json b/package.json
index 16d74df..995c0ec 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "@actions/exec": "^1.1.1",
     "@actions/glob": "^0.6.0",
     "yaml": "^2.8.2",
-    "zod": "^3.25.76"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@types/node": "^24.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c2ced54..b2d0ceb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -24,8 +24,8 @@ importers:
         specifier: ^2.8.2
         version: 2.8.3
       zod:
-        specifier: ^3.25.76
-        version: 3.25.76
+        specifier: ^4.0.0
+        version: 4.3.6
     devDependencies:
       '@types/node':
         specifier: ^24.0.0
@@ -1178,8 +1178,8 @@ packages:
     engines: {node: '>= 14.6'}
     hasBin: true
 
-  zod@3.25.76:
-    resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
+  zod@4.3.6:
+    resolution: {integrity: sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==}
 
 snapshots:
 
@@ -2145,4 +2145,4 @@ snapshots:
 
   yaml@2.8.3: {}
 
-  zod@3.25.76: {}
+  zod@4.3.6: {}