diff --git a/dgl/src/pugl-upstream b/dgl/src/pugl-upstream
index 89ec3dee..21cb3c8b 160000
--- a/dgl/src/pugl-upstream
+++ b/dgl/src/pugl-upstream
@@ -1 +1 @@
-Subproject commit 89ec3dee308ea133a58a230ce4bfadc60c6dfa2d
+Subproject commit 21cb3c8b480f4c97f888e3d08630ded9c8bf04a2