diff --git a/WORKSPACE b/WORKSPACE
index 9bfb716..743fcf3 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -68,6 +68,7 @@
     name = "debian_base",
     registry = "index.docker.io",
     repository = "library/debian",
+    tag = "stretch",
 )
 
 # rules for installing packages from debian snapshot