diff --git a/build-tag-push.py b/build-tag-push.py
index be60ca84..1dfafe22 100755
--- a/build-tag-push.py
+++ b/build-tag-push.py
@@ -63,6 +63,6 @@ for service_name, popen_object in push_operations.items():
 
 # Write the new docker-compose.yml file.
 with open(output_file, "w") as f:
-    yaml.safe_dump(stack, f)
+    yaml.safe_dump(stack, f, default_flow_style=False)
 
 print("Wrote new compose file: {}".format(output_file))
diff --git a/link-to-ambassadors.py b/link-to-ambassadors.py
index b9d3c79a..f3e2d0b3 100755
--- a/link-to-ambassadors.py
+++ b/link-to-ambassadors.py
@@ -41,5 +41,5 @@ for service_name, service in stack.items():
     if service_name in ports:
         service["ports"] = [ ports[service_name] ]
 
-yaml.safe_dump(stack, open(output_file, "w"))
+yaml.safe_dump(stack, open(output_file, "w"), default_flow_style=False)