diff --git a/Doxyfile b/Doxyfile
index 60fd1187..f1af27fd 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -48,7 +48,7 @@ PROJECT_NAME           = Condy
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = v1.8
+PROJECT_NUMBER         = v1.9
 
 # 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 viewers a
diff --git a/include/condy/version.hpp b/include/condy/version.hpp
index 01d135ef..587fce77 100644
--- a/include/condy/version.hpp
+++ b/include/condy/version.hpp
@@ -12,7 +12,7 @@
 /**
  * @brief Condy minor version.
  */
-#define CONDY_VERSION_MINOR 8
+#define CONDY_VERSION_MINOR 9
 
 namespace condy {