diff --git a/Makefile b/Makefile
index 9263e8f..68f13be 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ clean:
 	done
 
 format:
-	find . -type f \( -name "*.cpp" -o -name "*.h" -o -name "*.c" \) -exec clang-format -i {} \;
+	find . -type f \( -name "*.cc" -o -name "*.cpp" -o -name "*.h" -o -name "*.c" \) -exec clang-format -i {} \;
 
 
 .PHONY: build clean test format