diff --git a/src/Config.cpp b/src/Config.cpp
index 745339e..3338e9e 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -51,7 +51,11 @@ namespace config {
 
 		void setup() {
 			details::read();
-			//details::write();
+
+			if(strcasecmp_P(value.version, PSTR(VERSION))) {
+				strcpy_P(value.version, PSTR(VERSION));
+				details::write();
+			}
 		}
 
 		void save() {
diff --git a/src/config/System.h b/src/config/System.h
index a8ec933..6ba7ba9 100644
--- a/src/config/System.h
+++ b/src/config/System.h
@@ -20,7 +20,7 @@
  \def VERSION
  Version string, only used for indicative purpose
  */
-#define VERSION "1.20"
+#define VERSION "1.21"
 
 
 /**