diff --git a/signingscript/docker.d/mar-channels.yml b/signingscript/docker.d/mar-channels.yml
index e6efb7fe3..0919b3db8 100644
--- a/signingscript/docker.d/mar-channels.yml
+++ b/signingscript/docker.d/mar-channels.yml
@@ -13,8 +13,8 @@ in:
       '${scope_prefix[0]}cert:release-signing': ["*"]
       '${scope_prefix[0]}cert:dep-signing': ["*"]
     'COT_PRODUCT == "enterprise"':
-      '${scope_prefix[0]}cert:nightly-signing': ["firefox-enterprise-nightly"]
-      '${scope_prefix[0]}cert:release-signing': ["firefox-enterprise-release", "firefox-enterprise-beta"]
+      '${scope_prefix[0]}cert:nightly-signing': ["firefox-enterprise-nightly", "thunderbird-enterprise-nightly"]
+      '${scope_prefix[0]}cert:release-signing': ["firefox-enterprise-release", "firefox-enterprise-beta", "thunderbird-enterprise-release", "thunderbird-enterprise-beta"]
       '${scope_prefix[0]}cert:dep-signing': ["*"]
     'COT_PRODUCT == "firefox"':
       '${scope_prefix[0]}cert:nightly-signing': ["firefox-nightly-*", "firefox-mozilla-central", "firefox-mozilla-central-asan", "firefox-mozilla-aurora"]