diff --git a/y2023/vision/ccm.cc b/y2023/vision/ccm.cc
index d32cc2f..ecb9552 100644
--- a/y2023/vision/ccm.cc
+++ b/y2023/vision/ccm.cc
@@ -1,4 +1,5 @@
-#include "glog/logging.h"
+#include "absl/log/check.h"
+#include "absl/log/log.h"
 #include <opencv2/calib3d.hpp>
 #include <opencv2/highgui/highgui.hpp>
 #include <opencv2/imgproc.hpp>