diff --git a/conf/app.src b/conf/app.src
index 43c4d1f..dd3c011 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
 SOURCE_URL=https://releases.rocket.chat/4.7.2/download
-SOURCE_SUM=
+SOURCE_SUM=3345b6815a59635a373b0356bac5156f9f897a2227c12efcf56d3976559328f2
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true