diff --git a/src/lib/features/metrics/instance/findOutdatedSdks.test.ts b/src/lib/features/metrics/instance/findOutdatedSdks.test.ts
index 355254e891..10a88faaba 100644
--- a/src/lib/features/metrics/instance/findOutdatedSdks.test.ts
+++ b/src/lib/features/metrics/instance/findOutdatedSdks.test.ts
@@ -52,7 +52,7 @@ describe('findOutdatedSDKs', () => {
     });
 
     it('should ignore invalid SDK versions', () => {
-        const sdkVersions = ['unleash-client-node', '1.2.3'];
+        const sdkVersions = ['unleash-client-node', '1.2.3', null];
         const result = findOutdatedSDKs(sdkVersions);
         expect(result).toEqual([]);
     });
diff --git a/src/lib/features/metrics/instance/findOutdatedSdks.ts b/src/lib/features/metrics/instance/findOutdatedSdks.ts
index 3af2955e80..8a062d88ea 100644
--- a/src/lib/features/metrics/instance/findOutdatedSdks.ts
+++ b/src/lib/features/metrics/instance/findOutdatedSdks.ts
@@ -14,7 +14,8 @@ const config: SDKConfig = {
     'unleash-client-php': '2.3.0',
 };
 
-export const isOutdatedSdk = (sdkVersion: string) => {
+export const isOutdatedSdk = (sdkVersion: string | null) => {
+    if (sdkVersion == null) return false;
     const result = sdkVersion.split(':');
     if (result.length !== 2) return false;
     const [sdkName, version] = result;
@@ -24,8 +25,8 @@ export const isOutdatedSdk = (sdkVersion: string) => {
     return false;
 };
 
-export function findOutdatedSDKs(sdkVersions: string[]): string[] {
+export function findOutdatedSDKs(sdkVersions: (string | null)[]): string[] {
     const uniqueSdkVersions = Array.from(new Set(sdkVersions));
 
-    return uniqueSdkVersions.filter(isOutdatedSdk);
+    return uniqueSdkVersions.filter(isOutdatedSdk) as string[];
 }