diff --git a/packages/snaps-rpc-methods/jest.config.js b/packages/snaps-rpc-methods/jest.config.js
index e5ee2eb01e..015ebd2bcd 100644
--- a/packages/snaps-rpc-methods/jest.config.js
+++ b/packages/snaps-rpc-methods/jest.config.js
@@ -10,7 +10,7 @@ module.exports = deepmerge(baseConfig, {
   ],
   coverageThreshold: {
     global: {
-      branches: 91.81,
+      branches: 92.07,
       functions: 96.96,
       lines: 97.51,
       statements: 96.97,
diff --git a/packages/snaps-rpc-methods/src/restricted/notify.test.ts b/packages/snaps-rpc-methods/src/restricted/notify.test.ts
index 3c662c155e..aeecba1a38 100644
--- a/packages/snaps-rpc-methods/src/restricted/notify.test.ts
+++ b/packages/snaps-rpc-methods/src/restricted/notify.test.ts
@@ -229,7 +229,7 @@ describe('snap_notify', () => {
       expect(() =>
         getValidatedParams({ type: NotificationType.InApp, message: '' }),
       ).toThrow(
-        'Must specify a non-empty string "message" less than 50 characters long.',
+        'Must specify a non-empty string "message" less than 500 characters long.',
       );
     });
 
@@ -237,14 +237,14 @@ describe('snap_notify', () => {
       expect(() =>
         getValidatedParams({ type: NotificationType.InApp, message: 123 }),
       ).toThrow(
-        'Must specify a non-empty string "message" less than 50 characters long.',
+        'Must specify a non-empty string "message" less than 500 characters long.',
       );
     });
 
-    it('throws an error if the message is larger than 50 characters', () => {
+    it('throws an error if the message is larger than or equal to 50 characters for native notifications', () => {
       expect(() =>
         getValidatedParams({
-          type: NotificationType.InApp,
+          type: NotificationType.Native,
           message:
             'test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg',
         }),
@@ -253,6 +253,18 @@ describe('snap_notify', () => {
       );
     });
 
+    it('throws an error if the message is larger than or equal to 500 characters for in app notifications', () => {
+      expect(() =>
+        getValidatedParams({
+          type: NotificationType.InApp,
+          message:
+            'test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg_test_msg',
+        }),
+      ).toThrow(
+        'Must specify a non-empty string "message" less than 500 characters long.',
+      );
+    });
+
     it('returns valid parameters', () => {
       expect(getValidatedParams(validParams)).toStrictEqual(validParams);
     });
diff --git a/packages/snaps-rpc-methods/src/restricted/notify.ts b/packages/snaps-rpc-methods/src/restricted/notify.ts
index fdf3001be3..8c4c11f882 100644
--- a/packages/snaps-rpc-methods/src/restricted/notify.ts
+++ b/packages/snaps-rpc-methods/src/restricted/notify.ts
@@ -173,13 +173,27 @@ export function getValidatedParams(params: unknown): NotifyParams {
     });
   }
 
+  const isNotString = !message || typeof message !== 'string';
   // Set to the max message length on a Mac notification for now.
-  if (!message || typeof message !== 'string' || message.length >= 50) {
+  if (
+    type === NotificationType.Native &&
+    (isNotString || message.length >= 50)
+  ) {
     throw rpcErrors.invalidParams({
       message:
         'Must specify a non-empty string "message" less than 50 characters long.',
     });
   }
 
+  if (
+    type === NotificationType.InApp &&
+    (isNotString || message.length >= 500)
+  ) {
+    throw rpcErrors.invalidParams({
+      message:
+        'Must specify a non-empty string "message" less than 500 characters long.',
+    });
+  }
+
   return params as NotificationArgs;
 }