diff --git a/util/mirror-wiki.sh b/util/mirror-wiki.sh
new file mode 100755
index 0000000..684d545
--- /dev/null
+++ b/util/mirror-wiki.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -ex
+
+# Mirrors the contents of the GitLab wiki to GitHub.
+git clone git@gitlab.com:arctic-fox/spectator.wiki.git
+pushd spectator.wiki
+git remote add github git@github.com:icy-arctic-fox/spectator.wiki.git
+git fetch github
+git push github master
+popd
+rm -rf spectator.wiki