diff --git a/doc/cadet.doxyfile b/doc/cadet.doxyfile
index 25178a6a4..8955f0775 100644
--- a/doc/cadet.doxyfile
+++ b/doc/cadet.doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "CADET"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 4.2.0
+PROJECT_NUMBER         = 4.3.0
 
 # 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 71009505f..867f42abc 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    4.2.0
+ * @version    4.3.0
  * @date       2008-2021
  * @copyright  GNU General Public License v3.0 (or, at your option, any later version).
  */
diff --git a/version.txt b/version.txt
index ef8d7569d..80895903a 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-4.2.0
\ No newline at end of file
+4.3.0