diff --git a/package.json b/package.json
index b4760c2..354f7ab 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "chanfana": "^3.0.0",
     "hono": "^4.11.7",
-    "zod": "^4.3.6"
+    "zod": "^3.25.76"
   },
   "devDependencies": {
     "wrangler": "^4.61.1"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ace496c..cab4b7d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -15,8 +15,8 @@ importers:
         specifier: ^4.11.7
         version: 4.11.7
       zod:
-        specifier: ^4.3.6
-        version: 4.3.6
+        specifier: ^3.25.76
+        version: 3.25.76
     devDependencies:
       wrangler:
         specifier: ^4.61.1
@@ -520,6 +520,9 @@ packages:
   youch@4.1.0-beta.10:
     resolution: {integrity: sha512-rLfVLB4FgQneDr0dv1oddCVZmKjcJ6yX6mS4pU82Mq/Dt9a3cLZQ62pDBL4AUO+uVrCvtWz3ZFUL2HFAFJ/BXQ==}
 
+  zod@3.25.76:
+    resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
+
   zod@4.3.6:
     resolution: {integrity: sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==}
 
@@ -926,4 +929,6 @@ snapshots:
       cookie: 1.1.1
       youch-core: 0.3.3
 
+  zod@3.25.76: {}
+
   zod@4.3.6: {}