diff --git a/CMakeLists.txt b/CMakeLists.txt
index ee8a4342b..471de231f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ if(NOT CMAKE_BUILD_TYPE)
 	FORCE)
 endif()
 
-project(heyoka VERSION 6.0.0 LANGUAGES CXX C)
+project(heyoka VERSION 6.1.0 LANGUAGES CXX C)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/yacma")
 
@@ -337,7 +337,7 @@ if(HEYOKA_WITH_SLEEF)
 endif()
 
 # Setup the heyoka ABI version number.
-set(HEYOKA_ABI_VERSION 30)
+set(HEYOKA_ABI_VERSION 31)
 
 if(HEYOKA_BUILD_STATIC_LIBRARY)
     # Setup of the heyoka static library.