diff --git a/CMakeLists.txt b/CMakeLists.txt
index 81b2c4a51..5de10c117 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@
 cmake_minimum_required(VERSION 3.14)
 
 project(re
-  VERSION 3.17.0
+  VERSION 3.18.0
   LANGUAGES C
   HOMEPAGE_URL https://github.com/baresip/re
   DESCRIPTION "Generic library for real-time communications"
diff --git a/mk/Doxyfile b/mk/Doxyfile
index c4e564592..371b49132 100644
--- a/mk/Doxyfile
+++ b/mk/Doxyfile
@@ -4,7 +4,7 @@
 # Project related configuration options
 #---------------------------------------------------------------------------
 PROJECT_NAME           = libre
-PROJECT_NUMBER         = 3.17.0
+PROJECT_NUMBER         = 3.18.0
 OUTPUT_DIRECTORY       = ../re-dox
 CREATE_SUBDIRS         = NO
 OUTPUT_LANGUAGE        = English