diff --git a/packages/redux-devtools-serialize/src/types.ts b/packages/redux-devtools-serialize/src/types.ts
index 88dbad94..b30d0a96 100644
--- a/packages/redux-devtools-serialize/src/types.ts
+++ b/packages/redux-devtools-serialize/src/types.ts
@@ -1,5 +1,3 @@
-import { Seq } from 'immutable';
-
 interface SerializedImmutableMap {
   data: Record<string, unknown>;
   __serializedType__: 'ImmutableMap';