diff --git a/build-android/build.gradle b/build-android/build.gradle
index a24ebd80..c8ecd928 100644
--- a/build-android/build.gradle
+++ b/build-android/build.gradle
@@ -10,8 +10,7 @@ buildscript {
 }
 
 plugins {
-    id 'com.android.application' version '8.5.0' apply false
-    id 'com.android.library' version '8.5.0' apply false
+    id 'com.android.application' version '8.7.3' apply false
 }
 
 tasks.register('clean', Delete) {
diff --git a/build-android/gradle/wrapper/gradle-wrapper.properties b/build-android/gradle/wrapper/gradle-wrapper.properties
index 0d5cf62b..a112536d 100644
--- a/build-android/gradle/wrapper/gradle-wrapper.properties
+++ b/build-android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Sun Aug 07 11:51:41 CEST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/build-android/principia/build.gradle b/build-android/principia/build.gradle
index d3df156a..dbdbec0a 100644
--- a/build-android/principia/build.gradle
+++ b/build-android/principia/build.gradle
@@ -4,14 +4,14 @@ plugins {
 }
 
 android {
-    compileSdk 34
-    ndkVersion "26.2.11394342"
+    compileSdk 35
+    ndkVersion "27.2.12479018"
     namespace 'com.bithack.principia'
 
     defaultConfig {
         applicationId "com.bithack.principia"
         minSdk 21
-        targetSdk 34
+        targetSdk 35
         versionCode 37
         versionName "2024.07.12"
 
diff --git a/build-android/principia/src/main/java/org/libsdl/app/SDLActivity.java b/build-android/principia/src/main/java/org/libsdl/app/SDLActivity.java
index d645e623..06f939ff 100644
--- a/build-android/principia/src/main/java/org/libsdl/app/SDLActivity.java
+++ b/build-android/principia/src/main/java/org/libsdl/app/SDLActivity.java
@@ -156,7 +156,7 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
     private static final String TAG = "SDL";
     private static final int SDL_MAJOR_VERSION = 2;
     private static final int SDL_MINOR_VERSION = 30;
-    private static final int SDL_MICRO_VERSION = 6;
+    private static final int SDL_MICRO_VERSION = 9;
 
     public static boolean mIsResumedCalled, mHasFocus;
     public static final boolean mHasMultiWindow = (Build.VERSION.SDK_INT >= 24  /* Android 7.0 (N) */);