diff --git a/src/main.cpp b/src/main.cpp
index 3d58504..261026d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,7 +32,7 @@ typedef struct
 
 std::vector<espnow_message_t> espnowMessage;
 
-const String firmware{"1.2"};
+const String firmware{"1.21"};
 
 String espnowNetName{"DEFAULT"};