diff --git a/package-lock.json b/package-lock.json
index 73948ddcb3..4473707f03 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25890,7 +25890,7 @@
       "peerDependencies": {
         "arktype": ">=2.0.0",
         "valibot": ">=1.0.0",
-        "zod": "^3.25.0 || ^4.0.0"
+        "zod": "4.x"
       },
       "peerDependenciesMeta": {
         "arktype": {
diff --git a/packages/parser/package.json b/packages/parser/package.json
index d76db7a109..a96ecf84c6 100644
--- a/packages/parser/package.json
+++ b/packages/parser/package.json
@@ -205,7 +205,7 @@
   },
   "peerDependencies": {
     "@middy/core": "4.x || 5.x || 6.x",
-    "zod": "^3.25.0 || ^4.0.0"
+    "zod": "4.x"
   },
   "peerDependenciesMeta": {
     "zod": {