diff --git a/app/build.gradle b/app/build.gradle
index bb9db9c9..52d72314 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,7 +7,7 @@ android {
 
     defaultConfig {
         applicationId "com.simplemobiletools.contacts"
-        minSdkVersion 21
+        minSdkVersion 16
         targetSdkVersion 27
         versionCode 1
         versionName "1.0.0"