diff --git a/external/mmdetection b/external/mmdetection
index f30839c9c1e..6a6c6be177e 160000
--- a/external/mmdetection
+++ b/external/mmdetection
@@ -1 +1 @@
-Subproject commit f30839c9c1e5914b487ebc3770c5b1f779c67934
+Subproject commit 6a6c6be177e9338b5103a9eacde6796623edad14