diff --git a/conf/app.src b/conf/app.src
index c77ab8b..6cf1e57 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://releases.rocket.chat/4.5.0/download
-SOURCE_SUM=d0eaf809a4659766a19dc841fa7f0bcad45bbc001040d091212c769b5367a007
+SOURCE_URL=https://releases.rocket.chat/4.5.3/download
+SOURCE_SUM=62ee447a14e52fdbdd6003a0de81ee438e810f43633b3fb3df56e657cb9b4ec5
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index 3628abd..67d3d27 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Team collaboration communication platform",
         "fr": "Plateforme de communication collaborative en équipe"
     },
-    "version": "4.5.0~ynh1",
+    "version": "4.5.3~ynh1",
     "url": "https://rocket.chat",
     "upstream": {
         "license": "GPL-3.0",