diff --git a/ChangeLog.txt b/ChangeLog.txt
index aedf445..2bac7c5 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,3 +1,6 @@
+2022-12-06: Version 1.88
+- Update to Stockfish 15.1.
+
 2022-04-23: Version 1.87
 - Update to Stockfish 15.
 
diff --git a/DroidFishApp/build.gradle b/DroidFishApp/build.gradle
index aea7732..d566d6f 100644
--- a/DroidFishApp/build.gradle
+++ b/DroidFishApp/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "org.petero.droidfish"
         minSdkVersion 16
         targetSdkVersion 28
-        versionCode 97
-        versionName "1.87"
+        versionCode 98
+        versionName "1.88"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             ndkBuild {