diff --git a/packages/sdk/src/schema/pages.test.ts b/packages/sdk/src/schema/pages.test.ts
index 14c86501599e..a0ce119bc27f 100644
--- a/packages/sdk/src/schema/pages.test.ts
+++ b/packages/sdk/src/schema/pages.test.ts
@@ -1,5 +1,5 @@
 import { describe, test, expect } from "vitest";
-import { OldPagePath, ProjectNewRedirectPath } from "./pages";
+import { OldPagePath, PagePath, ProjectNewRedirectPath } from "./pages";
 
 describe("OldPagePath", () => {
   describe("basic validation", () => {
@@ -192,6 +192,26 @@ describe("OldPagePath", () => {
   });
 });
 
+describe("PagePath", () => {
+  describe("path length validation", () => {
+    test("accepts a path of exactly 255 characters", () => {
+      const path = "/" + "a".repeat(254);
+      expect(PagePath.safeParse(path).success).toBe(true);
+    });
+
+    test("rejects a path exceeding 255 characters", () => {
+      const path = "/" + "a".repeat(255);
+      const result = PagePath.safeParse(path);
+      expect(result.success).toBe(false);
+      if (!result.success) {
+        expect(result.error.issues[0].message).toBe(
+          "Path can't exceed 255 characters"
+        );
+      }
+    });
+  });
+});
+
 describe("ProjectNewRedirectPath", () => {
   test("accepts relative paths", () => {
     expect(ProjectNewRedirectPath.safeParse("/about").success).toBe(true);
diff --git a/packages/sdk/src/schema/pages.ts b/packages/sdk/src/schema/pages.ts
index 90ba2cf84f4b..27b8fff5c9d6 100644
--- a/packages/sdk/src/schema/pages.ts
+++ b/packages/sdk/src/schema/pages.ts
@@ -109,7 +109,8 @@ const DefaultPagePage = z
     // And we cannot customize it due to bug in Remix: https://github.com/remix-run/remix/issues/2933
     (path) => path !== "/build" && path.startsWith("/build/") === false,
     "/build prefix is reserved for the system"
-  );
+  )
+  .refine((path) => path.length <= 255, "Path can't exceed 255 characters");
 
 export const OldPagePath = z
   .string()