diff --git a/chart/values.yaml b/chart/values.yaml
index d39d82bde5700220c874a36b214d1f4cce7d573a..2742695d106d304a4b7b0aeb1cc708adce7f5e6e 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -1250,7 +1250,7 @@ addons:
     git:
       repo: https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost.git
       path: "./chart"
-      tag: "7.5.1-bb.4"
+      tag: "7.7.1-bb.0"
 
     # -- Flux reconciliation overrides specifically for the Mattermost Package
     flux: {}