diff --git a/src/google/adk/cli/fast_api.py b/src/google/adk/cli/fast_api.py
index a6e7d9f62c..2bab01a202 100644
--- a/src/google/adk/cli/fast_api.py
+++ b/src/google/adk/cli/fast_api.py
@@ -756,7 +756,6 @@ async def _get_a2a_runner_async() -> Runner:
       )
 
     import inspect
-    import json
 
     from google.adk.agents import Agent
     import google.auth