diff --git a/app/build.gradle b/app/build.gradle
index 6dc564bf..fa0eb2a0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -15,7 +15,7 @@ android {
     buildToolsVersion "29.0.3"
     defaultConfig {
         applicationId "com.geeksville.mesh"
-        minSdkVersion 22 // The oldest emulator image I have tried is 22 (though 21 probably works)
+        minSdkVersion 21 // The oldest emulator image I have tried is 22 (though 21 probably works)
         targetSdkVersion 29
         versionCode 175
         versionName "0.7.5"