diff --git a/packaging/build/lin.sh b/packaging/build/lin.sh
index 47c9dfa0..2ec75d4d 100755
--- a/packaging/build/lin.sh
+++ b/packaging/build/lin.sh
@@ -16,7 +16,7 @@ export CFLAGS="${FLAGS}"
 export CXXFLAGS="${FLAGS}"
 
 # Dependency version numbers
-VERSION_ZLIB=1.2.8
+VERSION_ZLIB=1.2.10
 VERSION_FFI=3.2.1
 VERSION_GLIB=2.50.1
 VERSION_XML2=2.9.4
@@ -24,7 +24,7 @@ VERSION_GSF=1.14.40
 VERSION_EXIF=0.6.21
 VERSION_LCMS2=2.8
 VERSION_JPEG=1.5.1
-VERSION_PNG16=1.6.25
+VERSION_PNG16=1.6.28
 VERSION_WEBP=0.5.1
 VERSION_TIFF=4.0.6
 VERSION_ORC=0.4.26