diff --git a/ops/tag-service/tag-tool.py b/ops/tag-service/tag-tool.py
index 19fbf7da..fac8f2f5 100644
--- a/ops/tag-service/tag-tool.py
+++ b/ops/tag-service/tag-tool.py
@@ -6,6 +6,7 @@
 SERVICES  = [
     'proxyd',
     'op-ufm',
+    'op-signer',
     'op-conductor-mon',
 ]
 VERSION_PATTERN = '^{service}/v\\d+\\.\\d+\\.\\d+(-rc\\.\\d+)?$'