diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fb25ee0c..bf161ec2b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.9)
 
 # set the project name and version
-project(CXXGraph VERSION 3.1.0)
+project(CXXGraph VERSION 4.0.0)
 
 configure_file(CXXGraphConfig.h.in ${PROJECT_SOURCE_DIR}/include/CXXGraph/CXXGraphConfig.h)
 
diff --git a/include/CXXGraph/CXXGraphConfig.h b/include/CXXGraph/CXXGraphConfig.h
index eb3aa8954..806984ac4 100644
--- a/include/CXXGraph/CXXGraphConfig.h
+++ b/include/CXXGraph/CXXGraphConfig.h
@@ -1,4 +1,4 @@
 // the configured options and settings for CXXGraph
-#define CXXGraph_VERSION_MAJOR 3
-#define CXXGraph_VERSION_MINOR 1
+#define CXXGraph_VERSION_MAJOR 4
+#define CXXGraph_VERSION_MINOR 0
 #define CXXGraph_VERSION_PATCH 0
diff --git a/packaging/deb/CXXGraph/DEBIAN/control b/packaging/deb/CXXGraph/DEBIAN/control
index 6b6555c4b..9042910d2 100755
--- a/packaging/deb/CXXGraph/DEBIAN/control
+++ b/packaging/deb/CXXGraph/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: CXXGraph
-Version: 3.1.0
+Version: 4.0.0
 Section: custom
 Priority: optional
 Architecture: all