diff --git a/conf/app.src b/conf/app.src
index 1762e57..ec5cac4 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://api.github.com/repos/jgraph/drawio/tarball/v20.5.0
-SOURCE_SUM=7f82b23e29fa1af10f52d1ea9957a934e51c61408d43206ae7bbd92d8eb71531
+SOURCE_URL=https://api.github.com/repos/jgraph/drawio/tarball/v20.5.3
+SOURCE_SUM=d2c496c18961beec09f8beffb41beaa95ab1481bfcb45fc71d6b97d40f393fc4
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index e657291..bd562ef 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams",
         "fr": "Application en ligne qui permet de faire des schémas et du dessin vectoriel"
     },
-    "version": "20.5.0~ynh1",
+    "version": "20.5.3~ynh1",
     "url": "https://www.diagrams.net/",
     "upstream": {
         "license": "Apache-2.0",