diff --git a/pythonbuild/downloads.py b/pythonbuild/downloads.py
index d9d2ebbc..ee81ad2d 100644
--- a/pythonbuild/downloads.py
+++ b/pythonbuild/downloads.py
@@ -150,10 +150,10 @@
         "version": "0.5",
     },
     "libX11": {
-        "url": "https://www.x.org/archive/individual/lib/libX11-1.6.12.tar.gz",
-        "size": 3168158,
-        "sha256": "0fce5fc0a24a3dc728174eccd0cb8d6a1b37a2ec1654bd5628c84e5bc200d594",
-        "version": "1.6.12",
+        "url": "https://www.x.org/archive/individual/lib/libX11-1.8.10.tar.gz",
+        "size": 3192536,
+        "sha256": "b7a1a90d881bb7b94df5cf31509e6b03f15c0972d3ac25ab0441f5fbc789650f",
+        "version": "1.8.10",
         "library_names": ["X11", "X11-xcb"],
         "licenses": ["MIT", "X11"],
         "license_file": "LICENSE.libX11.txt",