diff --git a/docker/images/dev-cli/Dockerfile b/docker/images/dev-cli/Dockerfile
index d14eb2fe..344d3702 100644
--- a/docker/images/dev-cli/Dockerfile
+++ b/docker/images/dev-cli/Dockerfile
@@ -46,7 +46,7 @@ RUN set -ex \
     && mkdir -p /srv/venv/pysky35 \
     && mkdir -p /srv/venv/pysky36 \
     && mkdir -p /srv/venv/pysky37 \
-    && virtualenv /srv/venv/pysky27 \
+    && virtualenv -p python2.7 /srv/venv/pysky27 \
     && /bin/bash -c "source /srv/venv/pysky27/bin/activate && pip install pyskycoin && deactivate" \
     && virtualenv -p python3.5 /srv/venv/pysky35 \
     && /bin/bash -c "source /srv/venv/pysky35/bin/activate && pip install pyskycoin && deactivate"