1 files changed, 2 insertions, 1 deletions
diff --git a/Dockerfile b/Dockerfile
index 22dd5d1..8ad5e5d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
-FROM astroconda/python:3.7.1
+ARG PYTHON_VERSION
+FROM astroconda/python:${PYTHON_VERSION}
 LABEL maintainer="jhunk@stsci.edu" \
       vendor="Space Telescope Science Institute"