diff --git a/app/build.gradle b/app/build.gradle
index 68b6ae4..dee8d48 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,7 +20,7 @@ def gitVersion() {
 }
 
 def versionCodeFromGit() {
-    def versionCode = gitVersion() + (ext.configuration.buildDate.format("SSssmm")).toInteger()
+    def versionCode = gitVersion() + (ext.configuration.buildDate.format("yyMd")).toInteger()
     println "version code " + versionCode
     return versionCode.toInteger()
 }