1 files changed, 3 insertions, 1 deletions

diff --git a/Dockerfile b/Dockerfile
index 82758da..124f68c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,6 @@
-FROM python:2.7
+ARG PYTHON_VERSION=2.7
+
+FROM python:${PYTHON_VERSION}
 
 RUN mkdir /src
 WORKDIR /src