diff --git a/CHANGELOG b/CHANGELOG
index 4c91fe9..1f45936 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,8 @@
 PROJECT: https://github.com/faf0/sct
 
+2.1: carlpitt on 31 Dec 2023
+* Optimized code, eliminating compiler warnings
+
 2.0: fac3plant on 27 Jul 2023
 * Option --toggle added to toggle between night (4500 K) and day (6500 K)
 temperature
diff --git a/src/xsct.h b/src/xsct.h
index 5536262..ba2afd3 100644
--- a/src/xsct.h
+++ b/src/xsct.h
@@ -17,7 +17,7 @@
 #ifndef __XSCT_H
 #define __XSCT_H
 
-#define XSCT_VERSION "2.0"
+#define XSCT_VERSION "2.1"
 
 #define TEMPERATURE_NORM    6500
 #define TEMPERATURE_NIGHT   4500
diff --git a/xsct.1 b/xsct.1
index 1cbbd75..4dc25da 100644
--- a/xsct.1
+++ b/xsct.1
@@ -1,4 +1,4 @@
-.TH xsct 1 "Jul 2023" "2.0" "User Manual"
+.TH xsct 1 "Dec 2023" "2.1" "User Manual"
 .SH NAME
 xsct \- X11 set screen color temperature
 .SH SYNOPSIS