diff --git a/extra/expat/checksums b/extra/expat/checksums
index 60acbaa6..52744747 100644
--- a/extra/expat/checksums
+++ b/extra/expat/checksums
@@ -1 +1 @@
-253e03c7042908c2c4c84fb4917a01203ad403fa09320f44cca5fa017064c40341
+6073c08783ba628dacc49fac99d2be8761be11d3d48d211f2844fc0a5ac1db00c4
diff --git a/extra/expat/sources b/extra/expat/sources
index f93bad81..6ba5b941 100644
--- a/extra/expat/sources
+++ b/extra/expat/sources
@@ -1 +1 @@
-https://github.com/libexpat/libexpat/releases/download/R_2_6_3/expat-2.6.3.tar.bz2
+https://github.com/libexpat/libexpat/releases/download/R_2_6_4/expat-2.6.4.tar.bz2
diff --git a/extra/expat/version b/extra/expat/version
index d07a753e..c689264b 100644
--- a/extra/expat/version
+++ b/extra/expat/version
@@ -1 +1 @@
-2.6.3 1
+2.6.4 1