diff --git a/PID_v1.cpp b/PID_v1.cpp
index 285de13..cb6637c 100644
--- a/PID_v1.cpp
+++ b/PID_v1.cpp
@@ -1,8 +1,8 @@
 /**********************************************************************************************
- * Arduino PID Library - Version 1.1.1
+ * Arduino PID Library - Version 1.2.1
  * by Brett Beauregard <br3ttb@gmail.com> brettbeauregard.com
  *
- * This Library is licensed under a GPLv3 License
+ * This Library is licensed under the MIT License
  **********************************************************************************************/
 
 #if ARDUINO >= 100
diff --git a/PID_v1.h b/PID_v1.h
index db710bf..9cba046 100644
--- a/PID_v1.h
+++ b/PID_v1.h
@@ -1,6 +1,6 @@
 #ifndef PID_v1_h
 #define PID_v1_h
-#define LIBRARY_VERSION	1.1.1
+#define LIBRARY_VERSION	1.2.1
 
 class PID
 {