diff --git a/build.gradle b/build.gradle
index 625dcc69..79175551 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ ext.propVersionCode = "0.1.beta.5"
 ext.propJavaVersion = "8"
 
 ext.propCompVersion = 29
-ext.propMinVersion = 15
+ext.propMinVersion = 20
 ext.propAndroidVersion = "1.1.0"
 
 buildscript {