diff --git a/metadata/com.github.axet.bookreader.yml b/metadata/com.github.axet.bookreader.yml
index b84b7bd7bb..b0eb18db4a 100644
--- a/metadata/com.github.axet.bookreader.yml
+++ b/metadata/com.github.axet.bookreader.yml
@@ -693,7 +693,18 @@ Builds:
       - sed -i -e '/credentials {/,/}/d; /maven {/,/}/d' ../android-bookreader-library/build.gradle
       - echo 'android {lintOptions {checkReleaseBuilds false}}' >> build.gradle
 
+  - versionName: 1.13.21
+    versionCode: 400
+    commit: bookreader-1.13.21
+    subdir: app
+    gradle:
+      - yes
+    prebuild:
+      - sed -i -e '/variant.outputs.each/,/}$/d; /enable true/d' build.gradle
+      - sed -i -e '/credentials {/,/}/d; /maven {/,/}/d' ../android-bookreader-library/build.gradle
+      - echo 'android {lintOptions {checkReleaseBuilds false}}' >> build.gradle
+
 AutoUpdateMode: Version bookreader-%v
 UpdateCheckMode: Tags
-CurrentVersion: 1.13.19
-CurrentVersionCode: 398
+CurrentVersion: 1.13.21
+CurrentVersionCode: 400