diff --git a/build-container.sh b/build-container.sh
index 9d9a693..e61de2b 100755
--- a/build-container.sh
+++ b/build-container.sh
@@ -2,4 +2,5 @@
 
 set -ex
 
+docker pull drupal:7
 docker build --force-rm -t nathan/drupal7 -f Dockerfile build