diff --git a/ampel-firmware/util.h b/ampel-firmware/util.h
index 19a32cdfee7231a3ae0bd0fbec947126b01a95d9..9b0d85d2c1ee6b9a4fea5101fcbf645057f8fc47 100644
--- a/ampel-firmware/util.h
+++ b/ampel-firmware/util.h
@@ -38,7 +38,7 @@ class Ampel {
 private:
   static void showFreeSpace();
 public:
-  const char *version = "v0.2.1"; // Update manually after significant changes.
+  const char *version = "v0.2.2-DEV"; // Update manually after significant changes.
   const char *board;
   const char *sensorId;
   uint32_t max_loop_duration;