diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -162,10 +162,7 @@ else()
 endif()
 
 # version number
-set(MAJOR_VERSION 0 CACHE INT "Program major version number.")
-set(MINOR_VERSION 8 CACHE INT "Program minor version number.")
-set(PATCH_VERSION 1 CACHE INT "Program patch version number.")
-set(VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}")
+set(VERSION_STRING "0.8.1" CACHE STRING "Program version number.")
 
 # get revision number from mercurial
 find_program(MERCURIAL hg)
diff --git a/src/version.h.in b/src/version.h.in
--- a/src/version.h.in
+++ b/src/version.h.in
@@ -1,5 +1,5 @@
 /*
-  Copyright © 2015 Hasan Yavuz Özderya
+  Copyright © 2017 Hasan Yavuz Özderya
 
   This file is part of serialplot.
 
@@ -20,9 +20,6 @@
 #ifndef VERSION_H
 #define VERSION_H
 
-#define MAJOR_VERSION    @MAJOR_VERSION@
-#define MINOR_VERSION    @MINOR_VERSION@
-#define PATCH_VERSION    @PATCH_VERSION@
 #define VERSION_STRING   "@VERSION_STRING@"
 #define VERSION_REVISION "@VERSION_REVISION@"