diff --git a/versions.properties b/versions.properties
index 6b33f24a..62121f0e 100644
--- a/versions.properties
+++ b/versions.properties
@@ -17,7 +17,7 @@ VERSION_LCMS=2.18
 VERSION_MOZJPEG=0826579
 VERSION_PANGO=1.57.1
 VERSION_PIXMAN=0.46.4
-VERSION_PNG=1.6.55
+VERSION_PNG=1.6.56
 VERSION_PROXY_LIBINTL=0.5
 VERSION_RSVG=2.62.1
 VERSION_TIFF=4.7.1