diff --git a/src/png b/src/png
index f1ecc2c50d..46b17e804b 160000
--- a/src/png
+++ b/src/png
@@ -1 +1 @@
-Subproject commit f1ecc2c50d0976f3d8f0eaf805cbc399c0780d8b
+Subproject commit 46b17e804bcab3729f69993c8dc2d1f1b15cc780