diff --git a/packages/apollo-server-core/src/ApolloServer.ts b/packages/apollo-server-core/src/ApolloServer.ts
index 5b527783a25..90c6388b5bb 100644
--- a/packages/apollo-server-core/src/ApolloServer.ts
+++ b/packages/apollo-server-core/src/ApolloServer.ts
@@ -728,7 +728,7 @@ export class ApolloServerBase<
       // random prefix each time we get a new schema.
       documentStore:
         this.config.documentStore === undefined
-          ? new UnboundedCache()
+          ? new InMemoryLRUCache()
           : this.config.documentStore === null
           ? null
           : new PrefixingKeyValueCache(
diff --git a/packages/apollo-server-core/src/__tests__/documentStore.test.ts b/packages/apollo-server-core/src/__tests__/documentStore.test.ts
index 4570f1c89a9..d65a96b298c 100644
--- a/packages/apollo-server-core/src/__tests__/documentStore.test.ts
+++ b/packages/apollo-server-core/src/__tests__/documentStore.test.ts
@@ -3,7 +3,7 @@ import type { DocumentNode } from 'graphql';
 
 import { ApolloServerBase } from '../ApolloServer';
 import assert from 'assert';
-import { UnboundedCache } from '../utils/UnboundedCache';
+import { InMemoryLRUCache } from '@apollo/utils.keyvaluecache';
 
 const typeDefs = gql`
   type Query {
@@ -54,7 +54,7 @@ describe('ApolloServerBase documentStore', () => {
     const options = await server.graphQLServerOptions();
     const embeddedStore = options.documentStore;
     assert(embeddedStore);
-    expect(embeddedStore).toBeInstanceOf(UnboundedCache);
+    expect(embeddedStore).toBeInstanceOf(InMemoryLRUCache);
 
     await server.executeOperation(operations.simple.op);