diff --git a/CMakeLists.txt b/CMakeLists.txt
index a61e375..cadde23 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,7 @@ target_include_directories(
   PUBLIC "./include"
   PRIVATE "./src" "./src/include" "./protocols" "${CMAKE_BINARY_DIR}")
 set_target_properties(aquamarine PROPERTIES VERSION ${AQUAMARINE_VERSION}
-                                            SOVERSION 2)
+                                            SOVERSION 3)
 target_link_libraries(aquamarine OpenGL::EGL OpenGL::OpenGL PkgConfig::deps)
 
 check_include_file("sys/timerfd.h" HAS_TIMERFD)
diff --git a/VERSION b/VERSION
index 1c09c74..1d0ba9e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.3.3
+0.4.0