diff --git a/docker/mainnet/cleanup-images.sh b/docker/mainnet/cleanup-images.sh
new file mode 100644
index 0000000..405d9f5
--- /dev/null
+++ b/docker/mainnet/cleanup-images.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# Remove all untagged docker images.
+docker rmi $(docker images | grep "^<none>" | awk '{print $3}')
+