diff --git a/doc/cadet.doxyfile b/doc/cadet.doxyfile
index 40cf73456..0ecac7e0c 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         = 3.2.0
+PROJECT_NUMBER         = 4.0.0
 
 # 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/doc/tex/docs/fileformat.tex b/doc/tex/docs/fileformat.tex
index 8c58c9e98..aeaa249be 100644
--- a/doc/tex/docs/fileformat.tex
+++ b/doc/tex/docs/fileformat.tex
@@ -2321,7 +2321,7 @@ \section{Meta group}
 
 \begin{groupscope}{/meta}{tab:FFMeta}
   \begin{dataset}[type=int,inout={In}]{FILE\_FORMAT}
-    Version of the file format (defaults to $030102 = 3.1.2$ if omitted) with two digits per part (Major.Minor.Patch)
+    Version of the file format (defaults to $040000 = 4.0.0$ if omitted) with two digits per part (Major.Minor.Patch)
   \end{dataset}
   \begin{dataset}[type=string,inout={Out}]{CADET\_VERSION}
     Version of the executed \CADET{} simulator
diff --git a/include/cadet/cadet.hpp b/include/cadet/cadet.hpp
index 0058e902d..cc37dd584 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    3.2.0
+ * @version    4.0.0
  * @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 a4f52a5db..0c89fc927 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.2.0
\ No newline at end of file
+4.0.0
\ No newline at end of file