diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1053e4e401d83397a1f2b9d6ce4b860f32c9a15e..312ff6223810b88e11bf3fe2d9355643707e47ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change Log
 
-## [v0.2.0](https://transfer.hft-stuttgart.de/gitlab/co2ampel/ampel-firmware/-/releases/v0.2.0) 2021/06/06
+## [v0.2.1](https://transfer.hft-stuttgart.de/gitlab/co2ampel/ampel-firmware/-/releases/v0.2.1) 2021/06/06
 
 * BUGFIX: Calibration was not applied correctly (Thanks Michael Käppler for bug finding & fixing!)
 * MQTT works again for ESP32 (board needs to be updated in Arduino IDE/PlaftormIO)
diff --git a/ampel-firmware/util.h b/ampel-firmware/util.h
index 1813292858b6d0e9655f98d8f0497442a6cda082..19a32cdfee7231a3ae0bd0fbec947126b01a95d9 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-DEV"; // Update manually after significant changes.
+  const char *version = "v0.2.1"; // Update manually after significant changes.
   const char *board;
   const char *sensorId;
   uint32_t max_loop_duration;