diff --git a/config/software/expat.rb b/config/software/expat.rb
index 4546a0e6c..a06f25b92 100644
--- a/config/software/expat.rb
+++ b/config/software/expat.rb
@@ -29,6 +29,7 @@
 internal_source url: "#{ENV["ARTIFACTORY_REPO_URL"]}/#{name}/#{name}-#{version}.tar.gz",
                 authorization: "X-JFrog-Art-Api:#{ENV["ARTIFACTORY_TOKEN"]}"
 
+version("2.6.4") { source sha256: "fd03b7172b3bd7427a3e7a812063f74754f24542429b634e0db6511b53fb2278" }
 version("2.5.0") { source sha256: "6b902ab103843592be5e99504f846ec109c1abb692e85347587f237a4ffa1033" }
 version("2.4.9") { source sha256: "4415710268555b32c4e5ab06a583bea9fec8ff89333b218b70b43d4ca10e38fa" }
 version("2.4.8") { source sha256: "398f6d95bf808d3108e27547b372cb4ac8dc2298a3c4251eb7aa3d4c6d4bb3e2" }
diff --git a/scripts/internal_sources.yml b/scripts/internal_sources.yml
index 57f8ec2b9..60fb30d89 100644
--- a/scripts/internal_sources.yml
+++ b/scripts/internal_sources.yml
@@ -327,6 +327,8 @@ software:
 
 - name: expat
   sources:
+  - url: https://github.com/libexpat/libexpat/releases/download/R_2_6_4/expat-2.6.4.tar.gz
+    sha256: fd03b7172b3bd7427a3e7a812063f74754f24542429b634e0db6511b53fb2278
   - url: https://github.com/libexpat/libexpat/releases/download/R_2_4_9/expat-2.4.9.tar.gz
     sha256: 4415710268555b32c4e5ab06a583bea9fec8ff89333b218b70b43d4ca10e38fa
   - url: https://github.com/libexpat/libexpat/releases/download/R_2_4_8/expat-2.4.8.tar.gz