diff --git a/tools/make-binaries b/tools/make-binaries
index d7166443f..98cd01213 100755
--- a/tools/make-binaries
+++ b/tools/make-binaries
@@ -67,7 +67,7 @@ rel_vsn=$(git describe --tags | sed -e 's/-g.*//' -e 's/-/./' | tr -d '[:space:]
 mix_vsn=$(mix_version "$rel_vsn")
 crosstool_vsn='1.26.0'
 termcap_vsn='1.3.1'
-expat_vsn='2.6.3'
+expat_vsn='2.6.4'
 zlib_vsn='1.3.1'
 yaml_vsn='0.2.5'
 ssl_vsn='3.3.2'