diff --git a/ChangeLog.txt b/ChangeLog.txt
index 2bac7c5..bcd7c63 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,3 +1,6 @@
+2023-07-01: Version 1.89
+- Update to Stockfish 16.
+
 2022-12-06: Version 1.88
 - Update to Stockfish 15.1.
 
diff --git a/DroidFishApp/build.gradle b/DroidFishApp/build.gradle
index d566d6f..20039fa 100644
--- a/DroidFishApp/build.gradle
+++ b/DroidFishApp/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "org.petero.droidfish"
         minSdkVersion 16
         targetSdkVersion 28
-        versionCode 98
-        versionName "1.88"
+        versionCode 99
+        versionName "1.89"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             ndkBuild {