diff --git a/docs/package.json b/docs/package.json
index 792cc1c0..4d5788ea 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -15,6 +15,6 @@
     "astro": "^5.16.0",
     "sharp": "^0.34.5",
     "typescript": "^5.9.3",
-    "zod": "^3.25.76"
+    "zod": "^4.3.5"
   }
 }
diff --git a/package.json b/package.json
index 0127aef1..ef068691 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
     "uuidv7-js": "^1.1.4",
     "x-forwarded-fetch": "^0.2.0",
     "xss": "^1.0.15",
-    "zod": "^4.2.1"
+    "zod": "^4.3.5"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.3.10",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index acec2bad..79ee5afb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -34,7 +34,7 @@ importers:
         version: 1.19.7(hono@4.11.3)
       '@hono/zod-validator':
         specifier: ^0.7.6
-        version: 0.7.6(hono@4.11.3)(zod@4.2.1)
+        version: 0.7.6(hono@4.11.3)(zod@4.3.5)
       '@js-temporal/polyfill':
         specifier: ^0.5.0
         version: 0.5.1
@@ -138,8 +138,8 @@ importers:
         specifier: ^1.0.15
         version: 1.0.15
       zod:
-        specifier: ^4.2.1
-        version: 4.2.1
+        specifier: ^4.3.5
+        version: 4.3.5
     devDependencies:
       '@biomejs/biome':
         specifier: ^2.3.10
@@ -199,8 +199,8 @@ importers:
         specifier: ^5.9.3
         version: 5.9.3
       zod:
-        specifier: ^3.25.76
-        version: 3.25.76
+        specifier: ^4.3.5
+        version: 4.3.5
 
 packages:
 
@@ -4820,8 +4820,8 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
-  zod@4.2.1:
-    resolution: {integrity: sha512-0wZ1IRqGGhMP76gLqz8EyfBXKk0J2qo2+H3fi4mcUP/KtTocoX08nmIAHl1Z2kJIZbZee8KOpBCSNPRgauucjw==}
+  zod@4.3.5:
+    resolution: {integrity: sha512-k7Nwx6vuWx1IJ9Bjuf4Zt1PEllcwe7cls3VNzm4CQ1/hgtFUK2bRNG3rvnpPUhFjmqJKAKtjV576KnUkHocg/g==}
 
   zwitch@2.0.4:
     resolution: {integrity: sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A==}
@@ -6366,10 +6366,10 @@ snapshots:
     dependencies:
       hono: 4.11.3
 
-  '@hono/zod-validator@0.7.6(hono@4.11.3)(zod@4.2.1)':
+  '@hono/zod-validator@0.7.6(hono@4.11.3)(zod@4.3.5)':
     dependencies:
       hono: 4.11.3
-      zod: 4.2.1
+      zod: 4.3.5
 
   '@humanwhocodes/retry@0.4.3': {}
 
@@ -10814,6 +10814,6 @@ snapshots:
 
   zod@3.25.76: {}
 
-  zod@4.2.1: {}
+  zod@4.3.5: {}
 
   zwitch@2.0.4: {}