diff --git a/conf/app.src b/conf/app.src
index d6d776d..fafb127 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,6 +1,6 @@
-SOURCE_URL=https://releases.mattermost.com/4.3.0/mattermost-4.3.0-linux-amd64.tar.gz
-SOURCE_SUM=c21eefaa87fca836e17d874296e67baf181ab5594f705090247614faae219d01
+SOURCE_URL=https://releases.mattermost.com/4.3.1/mattermost-4.3.1-linux-amd64.tar.gz
+SOURCE_SUM=1bd39d94e97802e55aa8b1a6bfc69a9322ac4da03a7d3825819656bf24224be6
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=mattermost-4.3.0-linux-amd64.tar.gz
+SOURCE_FILENAME=mattermost-4.3.1-linux-amd64.tar.gz