diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c49e434e4..294cd75c47 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -463,7 +463,7 @@ set(BOUT_LIB_PATH "${CMAKE_CURRENT_BINARY_DIR}/lib")
 set_target_properties(bout++ PROPERTIES
   LIBRARY_OUTPUT_DIRECTORY "${BOUT_LIB_PATH}"
   ARCHIVE_OUTPUT_DIRECTORY "${BOUT_LIB_PATH}"
-  SOVERSION 5.1.0)
+  SOVERSION 5.2.0)
 
 # Set some variables for the bout-config script
 set(CONFIG_LDFLAGS "${CONFIG_LDFLAGS} -L\$BOUT_LIB_PATH -lbout++")