diff --git a/src/clients/deno/deno.json b/src/clients/deno/deno.json
index 4433941..f520e92 100644
--- a/src/clients/deno/deno.json
+++ b/src/clients/deno/deno.json
@@ -11,7 +11,7 @@
     "tracing": "jsr:@bcheidemann/tracing@^0.9.0",
     "jsr:@std/fs": "jsr:@std/fs@^1.0.3",
     "jsr:@std/path": "jsr:@std/path@^1.0.6",
-    "npm:zod": "npm:zod@^3.23.8",
+    "npm:zod": "npm:zod@^4.0.0",
     "npm:type-fest": "npm:type-fest@^5.0.0"
   }
 }
diff --git a/src/clients/deno/deno.lock b/src/clients/deno/deno.lock
index 733a634..c3fbb62 100644
--- a/src/clients/deno/deno.lock
+++ b/src/clients/deno/deno.lock
@@ -11,7 +11,7 @@
     "npm:@opentelemetry/api@^1.9.0": "1.9.1",
     "npm:acorn@8.12.0": "8.12.0",
     "npm:type-fest@5": "5.6.0",
-    "npm:zod@^3.23.8": "3.23.8"
+    "npm:zod@4": "4.4.3"
   },
   "jsr": {
     "@bcheidemann/parse-params@0.5.1": {
@@ -61,8 +61,8 @@
         "tagged-tag"
       ]
     },
-    "zod@3.23.8": {
-      "integrity": "sha512-XBx9AXhXktjUqnepgTiE5flcKIYWi/rme0Eaj+5Y0lftuGBq+jyRu/md4WnuxqgP1ubdpNCsYEYPxrzVHD8d6g=="
+    "zod@4.4.3": {
+      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ=="
     }
   },
   "remote": {
@@ -75,7 +75,7 @@
       "jsr:@std/fs@^1.0.3",
       "jsr:@std/path@^1.0.6",
       "npm:type-fest@5",
-      "npm:zod@^3.23.8"
+      "npm:zod@4"
     ]
   }
 }