diff --git a/Doc/Doxygen/Doxyfile b/Doc/Doxygen/Doxyfile
index ecf916394869606648cc6ce70cc35268f16e5c9d..450bd2b301d6b11a2928176d8d401b09e2ddb248 100644
--- a/Doc/Doxygen/Doxyfile
+++ b/Doc/Doxygen/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "BornAgain"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.8.0
+PROJECT_NUMBER         = 1.8.99
 
 # 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/VERSION.cmake b/VERSION.cmake
index 5ca648868dfe0cb713e7f067b34a2e67b8244e72..06dddf8dbb39f28f796cd5585af71455b4b1c963 100644
--- a/VERSION.cmake
+++ b/VERSION.cmake
@@ -1,3 +1,3 @@
 set(BornAgain_VERSION_MAJOR 1)
 set(BornAgain_VERSION_MINOR 8)
-set(BornAgain_VERSION_PATCH 0)
+set(BornAgain_VERSION_PATCH 99)