diff --git a/docs/Manifest.toml b/docs/Manifest.toml
index c5e6d4b80..67ecab9e5 100644
--- a/docs/Manifest.toml
+++ b/docs/Manifest.toml
@@ -191,9 +191,9 @@ version = "0.1.10"
 
 [[Expat_jll]]
 deps = ["Artifacts", "JLLWrappers", "Libdl"]
-git-tree-sha1 = "1c6317308b9dc757616f0b5cb379db10494443a7"
+git-tree-sha1 = "cc5231d52eb1771251fbd37171dbc408bcc8a1b6"
 uuid = "2e619515-83b5-522b-bb60-26c02a35a201"
-version = "2.6.2+0"
+version = "2.6.4+0"
 
 [[ExprTools]]
 git-tree-sha1 = "27415f162e6028e81c72b82ef756bf321213b6ec"
diff --git a/test/environments/main/Manifest.toml b/test/environments/main/Manifest.toml
index 4ac08f209..4364f5661 100644
--- a/test/environments/main/Manifest.toml
+++ b/test/environments/main/Manifest.toml
@@ -202,9 +202,9 @@ uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
 
 [[Expat_jll]]
 deps = ["Artifacts", "JLLWrappers", "Libdl"]
-git-tree-sha1 = "1c6317308b9dc757616f0b5cb379db10494443a7"
+git-tree-sha1 = "cc5231d52eb1771251fbd37171dbc408bcc8a1b6"
 uuid = "2e619515-83b5-522b-bb60-26c02a35a201"
-version = "2.6.2+0"
+version = "2.6.4+0"
 
 [[ExprTools]]
 git-tree-sha1 = "27415f162e6028e81c72b82ef756bf321213b6ec"