diff --git a/.gitignore b/.gitignore
index 7d05db0..ef8b49e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -94,4 +94,5 @@ Demo/readme.txt
 Demo/segmentation/main_ljl_5_18.m
 Demo/segmentation/RegionGrowing_mex.mexw64
 Demo/CloudOptimization_Release.dll
-Demo/reconstruction.exe
\ No newline at end of file
+Demo/reconstruction.exe
+lib/CloudOptimization_Release.lib
\ No newline at end of file
diff --git a/lib/CloudOptimization_Release.lib b/lib/CloudOptimization_Release.lib
deleted file mode 100644
index b2182e7..0000000
Binary files a/lib/CloudOptimization_Release.lib and /dev/null differ