diff --git a/package-lock.json b/package-lock.json
index 30777535..43181c30 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7981,6 +7981,33 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/astro/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
+    "node_modules/astro/node_modules/zod-to-json-schema": {
+      "version": "3.24.6",
+      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.24.6.tgz",
+      "integrity": "sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==",
+      "license": "ISC",
+      "peerDependencies": {
+        "zod": "^3.24.1"
+      }
+    },
+    "node_modules/astro/node_modules/zod-to-ts": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/zod-to-ts/-/zod-to-ts-1.2.0.tgz",
+      "integrity": "sha512-x30XE43V+InwGpvTySRNz9kB7qFU8DlyEy7BsSTCHPH1R0QasMmHWZDCzYm6bVXtj/9NNJAZF3jW8rzFvH5OFA==",
+      "peerDependencies": {
+        "typescript": "^4.9.4 || ^5.0.2",
+        "zod": "^3"
+      }
+    },
     "node_modules/async": {
       "version": "3.2.6",
       "resolved": "https://registry.npmjs.org/async/-/async-3.2.6.tgz",
@@ -22143,32 +22170,14 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.1.12",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.1.12.tgz",
+      "integrity": "sha512-JInaHOamG8pt5+Ey8kGmdcAcg3OL9reK8ltczgHTAwNhMys/6ThXHityHxVV2p3fkw/c+MAvBHFVYHFZDmjMCQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
     },
-    "node_modules/zod-to-json-schema": {
-      "version": "3.24.6",
-      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.24.6.tgz",
-      "integrity": "sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==",
-      "license": "ISC",
-      "peerDependencies": {
-        "zod": "^3.24.1"
-      }
-    },
-    "node_modules/zod-to-ts": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/zod-to-ts/-/zod-to-ts-1.2.0.tgz",
-      "integrity": "sha512-x30XE43V+InwGpvTySRNz9kB7qFU8DlyEy7BsSTCHPH1R0QasMmHWZDCzYm6bVXtj/9NNJAZF3jW8rzFvH5OFA==",
-      "peerDependencies": {
-        "typescript": "^4.9.4 || ^5.0.2",
-        "zod": "^3"
-      }
-    },
     "node_modules/zwitch": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/zwitch/-/zwitch-2.0.4.tgz",
@@ -22187,7 +22196,7 @@
         "@ai-sdk/provider-utils": "^3.0.10",
         "@ax-llm/ax": "14.0.39",
         "ai": "^5.0.50",
-        "zod": "^3.23.8"
+        "zod": "^4.1.12"
       },
       "devDependencies": {
         "@types/react": "^19.0.5"
diff --git a/src/aisdk/package.json b/src/aisdk/package.json
index e28af876..418743c0 100644
--- a/src/aisdk/package.json
+++ b/src/aisdk/package.json
@@ -34,7 +34,7 @@
     "@ai-sdk/provider-utils": "^3.0.10",
     "@ax-llm/ax": "14.0.39",
     "ai": "^5.0.50",
-    "zod": "^3.23.8"
+    "zod": "^4.1.12"
   },
   "bugs": {
     "url": "https://github.com/@ax-llm/ax/issues"