diff --git a/.github/deploy_wiki.sh b/.github/deploy_wiki.sh
new file mode 100755
index 000000000..c0d0fe090
--- /dev/null
+++ b/.github/deploy_wiki.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+
+function debug() {
+    echo "::debug file=${BASH_SOURCE[0]},line=${BASH_LINENO[0]}::$1"
+}
+
+function warning() {
+    echo "::warning file=${BASH_SOURCE[0]},line=${BASH_LINENO[0]}::$1"
+}
+
+function error() {
+    echo "::error file=${BASH_SOURCE[0]},line=${BASH_LINENO[0]}::$1"
+}
+
+function add_mask() {
+    echo "::add-mask::$1"
+}
+
+if [ -z "$GITHUB_ACTOR" ]; then
+    error "GITHUB_ACTOR environment variable is not set"
+    exit 1
+fi
+
+if [ -z "$GITHUB_REPOSITORY" ]; then
+    error "GITHUB_REPOSITORY environment variable is not set"
+    exit 1
+fi
+
+if [ -z "$GH_PERSONAL_ACCESS_TOKEN" ]; then
+    error "GH_PERSONAL_ACCESS_TOKEN environment variable is not set"
+    exit 1
+fi
+
+if [ -z "$WIKI_PATH" ]; then
+    echo "WIKI_PATH environment variable is not set"
+    exit 1
+fi
+
+add_mask "${GH_PERSONAL_ACCESS_TOKEN}"
+
+if [ -z "${WIKI_COMMIT_MESSAGE:-}" ]; then
+    debug "WIKI_COMMIT_MESSAGE not set, using default"
+    WIKI_COMMIT_MESSAGE='Automatically publish wiki'
+fi
+
+GIT_REPOSITORY_URL="https://${GH_PERSONAL_ACCESS_TOKEN}@github.com/$GITHUB_REPOSITORY.wiki.git"
+
+debug "Checking out wiki repository"
+tmp_dir=$(mktemp -d -t ci-XXXXXXXXXX)
+(
+    cd "$tmp_dir" || exit 1
+    git init
+    git config user.name "$GITHUB_ACTOR"
+    git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+    git pull "$GIT_REPOSITORY_URL"
+)
+
+debug "Rsync contents of $WIKI_PATH"
+rsync -q -a --delete "$GITHUB_WORKSPACE/$WIKI_PATH/" "$tmp_dir"
+
+if [ ! -r "$tmp_dir/Home.md" ]; then
+    debug "Copy README.md to wiki/Home.md"
+    rsync -q -a "$GITHUB_WORKSPACE/README.md" "$tmp_dir/Home.md"
+fi
+
+debug "Committing and pushing changes"
+(
+    cd "$tmp_dir" || exit 1
+    git add .
+    git commit -m "$WIKI_COMMIT_MESSAGE"
+    git push --set-upstream "$GIT_REPOSITORY_URL" master
+)
+
+rm -rf "$tmp_dir"
+exit 0
+
diff --git a/.github/workflows/publish_wiki.yml b/.github/workflows/publish_wiki.yml
index d9bb9f5eb..ddd2af9ea 100644
--- a/.github/workflows/publish_wiki.yml
+++ b/.github/workflows/publish_wiki.yml
@@ -13,12 +13,9 @@ jobs:
     steps:
       - name: Checkout branch
         uses: actions/checkout@v1
-      - name: Copy README.md to wiki/Home.md
-        run: cp -f README.md wiki/Home.md
-      - name: Upload to Wiki
-        uses: SwiftDocOrg/github-wiki-publish-action@v1
-        with:
-          path: "wiki"
+      - name: Upload Documentation to Wiki
+        run: bash ./.github/deploy_wiki.sh
         env:
           GH_PERSONAL_ACCESS_TOKEN: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
+          WIKI_PATH: "wiki"