diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,11 +21,6 @@ cmake_minimum_required(VERSION 2.8.11)
 
 project(serialplot)
 
-set(MAJOR_VERSION 0)
-set(MINOR_VERSION 1)
-set(PATCH_VERSION 0)
-set(VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}")
-
 # Find includes in corresponding build directories
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
@@ -75,6 +70,32 @@ else()
   message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
 endif()
 
+# version number
+set(MAJOR_VERSION 0)
+set(MINOR_VERSION 1)
+set(PATCH_VERSION 0)
+set(VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}")
+
+# get revision number from mercurial
+find_program(MERCURIAL hg)
+
+if (MERCURIAL)
+  execute_process(COMMAND ${MERCURIAL} id -i
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    RESULT_VARIABLE MERCURIAL_RESULT
+    OUTPUT_VARIABLE VERSION_REVISION
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+  if(NOT MERCURIAL_RESULT EQUAL 0)
+    set(VERSION_SCM_REVISION false)
+  endif(NOT MERCURIAL_RESULT EQUAL 0)
+endif (MERCURIAL)
+
+if (NOT VERSION_REVISION)
+  set(VERSION_REVISION "0")
+endif (NOT VERSION_REVISION)
+
+message("SCM revision: ${VERSION_REVISION}")
+
 # configure version file
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/version.h.in" "${CMAKE_CURRENT_BINARY_DIR}/version.h")
 
diff --git a/about_dialog.ui b/about_dialog.ui
--- a/about_dialog.ui
+++ b/about_dialog.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>487</width>
-    <height>300</height>
+    <height>325</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -17,7 +17,7 @@
    <item>
     <widget class="QLabel" name="lbAbout">
      <property name="text">
-      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:14pt;&quot;&gt;SerialPlot&lt;/span&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:10pt;&quot;&gt;$VERSION_STRING$&lt;/span&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;Developed by Hasan Yavuz Özderya&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;Using Qt and Qwt (&lt;a href=&quot;http://qwt.sf.net&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://qwt.sf.net&lt;/span&gt;&lt;/a&gt;)&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;br/&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;This software is GPL licensed. You can obtain source code from &lt;a href=&quot;https://bitbucket.org/hyOzd/serialplot&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;https://bitbucket.org/hyOzd/serialplot&lt;/span&gt;&lt;/a&gt;.&lt;br/&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:14pt;&quot;&gt;SerialPlot&lt;/span&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;span style=&quot; font-size:10pt;&quot;&gt;$VERSION_STRING$&lt;/span&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;Developed by Hasan Yavuz Özderya&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;Using Qt and Qwt (&lt;a href=&quot;http://qwt.sf.net&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;http://qwt.sf.net&lt;/span&gt;&lt;/a&gt;)&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;br/&gt;&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;This software is GPL licensed. You can obtain source code from &lt;a href=&quot;https://bitbucket.org/hyOzd/serialplot&quot;&gt;&lt;span style=&quot; text-decoration: underline; color:#0000ff;&quot;&gt;https://bitbucket.org/hyOzd/serialplot&lt;/span&gt;&lt;/a&gt;.&lt;/p&gt;&lt;p align=&quot;center&quot;&gt;&lt;br/&gt;&lt;/p&gt;&lt;p align=&quot;right&quot;&gt;&lt;span style=&quot; font-size:8pt;&quot;&gt;RevID: $VERSION_REVISION$&lt;br/&gt;&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
      </property>
      <property name="wordWrap">
       <bool>true</bool>
diff --git a/mainwindow.cpp b/mainwindow.cpp
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -215,6 +215,7 @@ void MainWindow::setupAboutDialog()
 
     QString aboutText = uiAboutDialog.lbAbout->text();
     aboutText.replace("$VERSION_STRING$", VERSION_STRING);
+    aboutText.replace("$VERSION_REVISION$", VERSION_REVISION);
     uiAboutDialog.lbAbout->setText(aboutText);
 }
 
diff --git a/version.h.in b/version.h.in
--- a/version.h.in
+++ b/version.h.in
@@ -21,3 +21,4 @@
 #define MINOR_VERSION    @MINOR_VERSION@
 #define PATCH_VERSION    @PATCH_VERSION@
 #define VERSION_STRING   "@VERSION_STRING@"
+#define VERSION_REVISION "@VERSION_REVISION@"