diff --git a/conf/app.src b/conf/app.src
index 27d9b28..eebcb02 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/backdrop/backdrop/releases/download/1.22.2/backdrop.zip
-SOURCE_SUM=ffec826e9b9ccbead7d2baeae3c6622cb6aeb09f6f33f9463e9a41ac257039a2
+SOURCE_URL=https://github.com/backdrop/backdrop/releases/download/1.23.1/backdrop.zip
+SOURCE_SUM=2cdc132e2b235f38752f317bd7d8c64bcecad3f8f9101a296af9469247e56985
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index 00f8942..f419d76 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Easy-to-use CMS for building professional websites",
         "fr": "CMS facile à utiliser pour créer des sites Web professionnels"
     },
-    "version": "1.22.2~ynh2",
+    "version": "1.23.1~ynh1",
     "url": "https://backdropcms.org/",
     "upstream": {
         "license": "GPL-2.0",