diff --git a/app/build.gradle b/app/build.gradle
index 4facf2fa78..deae8d2334 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -107,11 +107,11 @@ android {
     compileSdkVersion 28
 
     defaultConfig {
-        minSdkVersion 21
+        minSdkVersion 23
         targetSdkVersion 28
         multiDexEnabled true
         versionCode 1500
-        version "2.3.1-dev-28"
+        version "2.4-dev"
         buildConfigField "String", "VERSION", '"' + version + '"'
         buildConfigField "String", "BUILDVERSION", '"' + generateGitBuild() + '-' + generateDate() + '"'
         buildConfigField "String", "REMOTE", '"' + generateGitRemote() + '"'