diff --git a/library.properties b/library.properties
index 3549ebc..e6acec0 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=AirGradient Air Quality Sensor
-version=3.1.16
+version=3.1.21
 author=AirGradient <support@airgradient.com>
 maintainer=AirGradient <support@airgradient.com>
 sentence=ESP32-C3 / ESP8266 library for air quality monitor measuring PM, CO2, Temperature, TVOC and Humidity with OLED display.
diff --git a/src/AirGradient.h b/src/AirGradient.h
index 25b66b2..5c39243 100644
--- a/src/AirGradient.h
+++ b/src/AirGradient.h
@@ -15,7 +15,7 @@
 #include "Main/utils.h"
 
 #ifndef GIT_VERSION
-#define GIT_VERSION "3.1.16-snap"
+#define GIT_VERSION "3.1.21-snap"
 #endif
 
 #ifndef ESP8266