diff --git a/Dockerfile b/Dockerfile
index 491f957..0b5b6e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 
 ENV DEBCONF_NOWARNINGS=yes
 ENV DEBIAN_FRONTEND noninteractive
-ENV ROS_PYTHON_VERSION 1
+ENV ROS_PYTHON_VERSION 2
 SHELL ["/bin/bash", "-c"]
 
 RUN sed -i 's@archive.ubuntu.com@ftp.jaist.ac.jp/pub/Linux@g' /etc/apt/sources.list