Index: src/CMakeLists.txt
--- src/CMakeLists.txt.orig
+++ src/CMakeLists.txt
@@ -25,11 +25,11 @@ add_library(opencsg
 
 target_include_directories(opencsg PUBLIC
     "${CMAKE_SOURCE_DIR}/include"
 )
 
 set_target_properties(opencsg PROPERTIES
-    VERSION ${PROJECT_VERSION}
-    SOVERSION ${PROJECT_VERSION_MAJOR}
+    VERSION ${LIBopencsg_VERSION}
+    SOVERSION ${LIBopencsg_VERSION}
     PUBLIC_HEADER "${CMAKE_SOURCE_DIR}/include/opencsg.h" 
 )
 
