diff --git a/.github/workflows/ios-build-custom-dev-app.yml b/.github/workflows/ios-build-custom-dev-app.yml
index 011a5ce65..66621e639 100644
--- a/.github/workflows/ios-build-custom-dev-app.yml
+++ b/.github/workflows/ios-build-custom-dev-app.yml
@@ -13,9 +13,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: switch XCode to 14.3.1
+      - name: switch XCode to 15.4
         run: | 
-          sudo xcode-select -s /Applications/Xcode_14.3.1.app
+          sudo xcode-select -s /Applications/Xcode_15.4.app
       - name: actions/setup-node
         uses: actions/setup-node@v3
         with:
diff --git a/android/build.gradle b/android/build.gradle
index 596c32032..fed38c3a1 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -3,7 +3,7 @@
 buildscript {
     ext {
         buildToolsVersion = "34.0.0"
-        minSdkVersion = 21
+        minSdkVersion = 23
         compileSdkVersion = 34
         targetSdkVersion = 34
         kotlin_version = "1.7.21"