diff --git a/MPChartExample/build.gradle b/MPChartExample/build.gradle
index ce1c69ee15..1a484fcc15 100644
--- a/MPChartExample/build.gradle
+++ b/MPChartExample/build.gradle
@@ -7,7 +7,7 @@ android {
     namespace 'com.xxmassdeveloper.mpchartexample'
     defaultConfig {
         applicationId "com.xxmassdeveloper.mpchartexample"
-        minSdkVersion 19
+        minSdkVersion 21
         compileSdk 34
         targetSdkVersion 34
         versionCode getGitCommitCount()
diff --git a/MPChartLib/build.gradle b/MPChartLib/build.gradle
index 310686b7d4..01f90781e0 100644
--- a/MPChartLib/build.gradle
+++ b/MPChartLib/build.gradle
@@ -17,7 +17,7 @@ ext {
 android {
     namespace 'com.github.mikephil.charting'
     defaultConfig {
-        minSdkVersion 19
+        minSdkVersion 21
         compileSdk 34
         targetSdkVersion 34