diff --git a/packages/pl-fe/src/actions/instance.ts b/packages/pl-fe/src/actions/instance.ts
index 3f2370050..15f95e4a5 100644
--- a/packages/pl-fe/src/actions/instance.ts
+++ b/packages/pl-fe/src/actions/instance.ts
@@ -47,7 +47,7 @@ interface StandaloneCheckSuccessAction {
 
 const checkIfStandalone = () => (dispatch: AppDispatch) =>
   staticFetch('/api/v1/instance', { method: 'HEAD' })
-    .then(({ ok, headers }) => dispatch<StandaloneCheckSuccessAction>({ type: STANDALONE_CHECK_SUCCESS, ok: ok && headers.get('content-type') === 'application/json' }))
+    .then(({ ok, headers }) => dispatch<StandaloneCheckSuccessAction>({ type: STANDALONE_CHECK_SUCCESS, ok: ok && !!headers.get('content-type')?.includes('application/json') }))
     .catch((err) => dispatch<StandaloneCheckSuccessAction>({ type: STANDALONE_CHECK_SUCCESS, ok: err.response?.ok }));
 
 type InstanceAction =