diff --git a/doc/cadet.doxyfile b/doc/cadet.doxyfile
index 0ecac7e0c..7b54a3ac0 100644
--- a/doc/cadet.doxyfile
+++ b/doc/cadet.doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Chromatography Analysis and Design Toolkit (CADET)"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 4.0.0
+PROJECT_NUMBER         = 4.0.1
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/include/cadet/cadet.hpp b/include/cadet/cadet.hpp
index cc37dd584..4a56789e6 100644
--- a/include/cadet/cadet.hpp
+++ b/include/cadet/cadet.hpp
@@ -15,7 +15,7 @@
  * The library provides a fast and accurate forward simulator for the general rate model of column liquid chromatography
  * 
  * @authors    Eric von Lieres, Joel Andersson, Andreas Puettmann, Sebastian Schnittert, Samuel Leweke, William Heymann
- * @version    4.0.0
+ * @version    4.0.1
  * @date       2008-2020
  * @copyright  GNU General Public License v3.0 (or, at your option, any later version).
  */
diff --git a/version.txt b/version.txt
index 0c89fc927..cc868b62c 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-4.0.0
\ No newline at end of file
+4.0.1
\ No newline at end of file