diff --git a/app/build.gradle b/app/build.gradle
index 481da433..23151ee2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -15,7 +15,7 @@ android {
 
     defaultConfig {
         applicationId "com.simplemobiletools.contacts.pro"
-        minSdkVersion 23
+        minSdkVersion 21
         targetSdkVersion 29
         versionCode 63
         versionName "6.10.2"