diff --git a/docker.sh b/docker.sh
index b6f6f34..bcbaaac 100755
--- a/docker.sh
+++ b/docker.sh
@@ -2,6 +2,8 @@
 
 set -exu
 
+TAG=$(git rev-parse --short HEAD)
+
 (
 rm -rf docker/app
 mkdir -p docker/app
@@ -9,6 +11,6 @@ yesod keter
 cd docker/app
 tar xf ../../stackage-server.keter
 cd ..
-docker build -t snoyberg/stackage-server .
-docker push snoyberg/stackage-server
+docker build -t snoyberg/stackage-server:$TAG .
+docker push snoyberg/stackage-server:$TAG
 )