diff --git a/CMakeLists.txt b/CMakeLists.txt
index 86bcaf66..83121920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,8 +41,8 @@ SET( PACKAGE_STRING         "exiv2 0.21" )
 SET( PACKAGE_TARNAME        "exiv2" )
 SET( PACKAGE_VERSION        "0.21" )
 SET( PACKAGE_URL            "http://www.exiv2.org" )
-SET( GENERIC_LIB_VERSION    "9.0.0" )
-SET( GENERIC_LIB_SOVERSION  "9" )
+SET( GENERIC_LIB_VERSION    "10.0.0" )
+SET( GENERIC_LIB_SOVERSION  "10" )
 
 # options and there default values
 OPTION( EXIV2_ENABLE_SHARED        "Build exiv2 as a shared library (dll)"                 ON  )
diff --git a/config/configure.ac b/config/configure.ac
index 5c84fa26..cbaa6720 100644
--- a/config/configure.ac
+++ b/config/configure.ac
@@ -4,7 +4,7 @@
 AC_PREREQ(2.61)
 AC_INIT(exiv2, 0.21, ahuggel@gmx.net)
 # See http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-EXIV2_LTVERSION=9:0:0
+EXIV2_LTVERSION=10:0:0
 PACKAGE=$PACKAGE_NAME
 VERSION=$PACKAGE_VERSION
 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")