diff --git a/lib/v4/errorMap/errorMap.test.ts b/lib/v4/errorMap/errorMap.test.ts
index 2a13158..a7c7f29 100644
--- a/lib/v4/errorMap/errorMap.test.ts
+++ b/lib/v4/errorMap/errorMap.test.ts
@@ -1001,35 +1001,15 @@ describe('errorMap', () => {
       // check that underlying issues are formatted with our custom error map
       expect(result.error.issues[0]).toMatchInlineSnapshot(`
         {
-          "code": "invalid_union",
-          "errors": [
-            [
-              {
-                "code": "invalid_value",
-                "message": "expected value to be false",
-                "path": [],
-                "values": [
-                  false,
-                ],
-              },
-            ],
-            [
-              {
-                "code": "too_small",
-                "inclusive": true,
-                "message": "number must be greater than or equal to 1",
-                "minimum": 1,
-                "origin": "number",
-                "path": [
-                  "baz",
-                ],
-              },
-            ],
-          ],
-          "message": "Invalid input",
+          "code": "too_small",
+          "inclusive": true,
+          "message": "number must be greater than or equal to 1",
+          "minimum": 1,
+          "origin": "number",
           "path": [
             "foo",
             "bar",
+            "baz",
           ],
         }
       `);
diff --git a/package-lock.json b/package-lock.json
index d723024..b98af1d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9255,11 +9255,10 @@
       }
     },
     "node_modules/zod": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.5.tgz",
-      "integrity": "sha512-/5UuuRPStvHXu7RS+gmvRf4NXrNxpSllGwDnCBcJZtQsKrviYXm54yDGV2KYNLT5kq0lHGcl7lqWJLgSaG+tgA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.17.tgz",
+      "integrity": "sha512-1PHjlYRevNxxdy2JZ8JcNAw7rX8V9P1AKkP+x/xZfxB0K5FYfuV+Ug6P/6NVSR2jHQ+FzDDoDHS04nYUsOIyLQ==",
       "dev": true,
-      "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
@@ -15394,9 +15393,9 @@
       "dev": true
     },
     "zod": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.5.tgz",
-      "integrity": "sha512-/5UuuRPStvHXu7RS+gmvRf4NXrNxpSllGwDnCBcJZtQsKrviYXm54yDGV2KYNLT5kq0lHGcl7lqWJLgSaG+tgA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.17.tgz",
+      "integrity": "sha512-1PHjlYRevNxxdy2JZ8JcNAw7rX8V9P1AKkP+x/xZfxB0K5FYfuV+Ug6P/6NVSR2jHQ+FzDDoDHS04nYUsOIyLQ==",
       "dev": true
     }
   }