diff --git a/tools/pngquant b/tools/pngquant
index 6ad92e43..c4408f3f 160000
--- a/tools/pngquant
+++ b/tools/pngquant
@@ -1 +1 @@
-Subproject commit 6ad92e439f5ba3e49da0c06773c752bb89068fd1
+Subproject commit c4408f3f4c00b414b4ffdb746b54cc7fa8a8ef39