update col width
diff --git a/.clang-format b/.clang-format
index 9b1bf1e..f81f357 100644
--- a/.clang-format
+++ b/.clang-format
@@ -7,6 +7,6 @@ PointerAlignment: Middle
TabWidth: '4'
UseTab: Never
Cpp11BracedListStyle: false
-ColumnLimit: 100
+ColumnLimit: 120
...
