diff --git a/VERSION b/VERSION
index f8e233b..9ab8337 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.9.0
+1.9.1
diff --git a/docs/changelog.rst b/docs/changelog.rst
index c470300..3019e7c 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,7 +5,7 @@ Changelog
 .. highlight:: cpp
 .. namespace:: profit
 
-.. rubric:: Development
+.. rubric:: 1.9.1
 
 * The implementation of the :class:`Model` class has been improved.
   In particular it has been made more memory efficient,