diff --git a/src/external-runtime-backend.ts b/src/external-runtime-backend.ts
index 5eb689c18..efbba896c 100644
--- a/src/external-runtime-backend.ts
+++ b/src/external-runtime-backend.ts
@@ -18,7 +18,7 @@ export interface ExternalAgentRuntimeBackend {
   preserve?(): Promise<void>;
 }
 
-export type ExternalRuntimeWorkflowDependencies = Pick<
+type ExternalRuntimeWorkflowDependencies = Pick<
   WorkflowDependencies,
   'startContainers' | 'runAgentCommand'
 >;