diff --git a/ipython/Dockerfile.controller b/ipython/Dockerfile.controller
index d325c6f8..2993d5f8 100644
--- a/ipython/Dockerfile.controller
+++ b/ipython/Dockerfile.controller
@@ -1,4 +1,4 @@
-FROM python:3.5-alpine
+FROM python:3.8-alpine
 
 LABEL maintainer="ahkui <ahkui@outlook.com>"