diff --git a/.github/workflows/deploy-test.yml b/.github/workflows/deploy-test.yml
index c0db5282..0793d565 100644
--- a/.github/workflows/deploy-test.yml
+++ b/.github/workflows/deploy-test.yml
@@ -20,4 +20,5 @@ jobs:
       with:
         provider: 'github'
         token: ${{ secrets.GITHUB_TOKEN }}
+        ssh_private_key: ''
         jekyll_src: './test_site'
diff --git a/action.yml b/action.yml
index 0c1a6e05..9f23bddb 100644
--- a/action.yml
+++ b/action.yml
@@ -8,6 +8,9 @@ inputs:
   token:
     description: 'The deploy token'
     required: false
+  ssh_private_key:
+    description: 'The SSH private key for deployment'
+    required: false
   repository:
     description: 'The deploy repository'
     required: false
diff --git a/entrypoint.sh b/entrypoint.sh
index af5fceb8..e810888f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -8,6 +8,7 @@ WORKING_DIR=${PWD}
 # Initial default value
 PROVIDER=${INPUT_PROVIDER:=github}
 TOKEN=${INPUT_TOKEN}
+SSH_PRIVATE_KEY=${INPUT_SSH_PRIVATE_KEY}
 ACTOR=${INPUT_ACTOR}
 REPOSITORY=${INPUT_REPOSITORY}
 BRANCH=${INPUT_BRANCH}
@@ -121,14 +122,31 @@ build_jekyll || {
   build_jekyll
 }
 
+# Pre-handle SSH private key
+if [[ -n "${SSH_PRIVATE_KEY}" ]]; then
+  echo "Pre-handle SSH private key file"
+  SSH_PRIVATE_KEY_PATH=$(mktemp /tmp/ssh-priv-key.XXXXXX)
+  echo "${SSH_PRIVATE_KEY}" > ${SSH_PRIVATE_KEY_PATH}
+  # To prevent from permissions are too open issue, the key can be
+  # only readable by self
+  chmod 400 ${SSH_PRIVATE_KEY_PATH}
+fi
+
 cd ${WORKING_DIR}/build
 
 # Check if deploy on the same repository branch
+PROVIDER_EXIT_CODE=0
 if [[ "${PROVIDER}" == "github" ]]; then
   source "${SCRIPT_DIR}/providers/github.sh"
 else
   echo "${PROVIDER} is an unsupported provider."
-  exit 1
+  PROVIDER_EXIT_CODE=1
+fi
+
+# Post-handle SSH private key
+if [[ -n "${SSH_PRIVATE_KEY}" ]]; then
+  echo "Post-handle SSH private key file"
+  rm -f ${SSH_PRIVATE_KEY_PATH}
 fi
 
-exit $?
+exit ${PROVIDER_EXIT_CODE}
diff --git a/providers/github.sh b/providers/github.sh
index 02b5cee1..04775f9f 100755
--- a/providers/github.sh
+++ b/providers/github.sh
@@ -1,9 +1,9 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 # Check if deploy to same branch
-if [ "${REPOSITORY}" = "${GITHUB_REPOSITORY}" ]; then
-  if [ "${GITHUB_REF}" = "refs/heads/${BRANCH}" ]; then
+if [[ "${REPOSITORY}" = "${GITHUB_REPOSITORY}" ]]; then
+  if [[ "${GITHUB_REF}" = "refs/heads/${BRANCH}" ]]; then
     echo "It's conflicted to deploy on same branch ${BRANCH}"
     exit 1
   fi
@@ -11,21 +11,29 @@ fi
 
 # Tell GitHub Pages not to run Jekyll
 touch .nojekyll
-[ -n "$INPUT_CNAME" ] && echo "$INPUT_CNAME" > CNAME
+[[ -n "$INPUT_CNAME" ]] && echo "$INPUT_CNAME" > CNAME
+
+# Prefer to use SSH approach when SSH private key is provided
+if [[ -n "${SSH_PRIVATE_KEY}" ]]; then
+  export GIT_SSH_COMMAND="ssh -i ${SSH_PRIVATE_KEY_PATH} \
+    -o StrictHostKeyChecking=no \
+    -o UserKnownHostsFile=/dev/null"
+  REMOTE_REPO="git@github.com:${REPOSITORY}.git"
+else
+  REMOTE_REPO="https://${ACTOR}:${TOKEN}@github.com/${REPOSITORY}.git"
+fi
 
 echo "Deploying to ${REPOSITORY} on branch ${BRANCH}"
-echo "Deploying to https://${ACTOR}:${TOKEN}@github.com/${REPOSITORY}.git"
+echo "Deploying to ${REMOTE_REPO}"
 
-REMOTE_REPO="https://${ACTOR}:${TOKEN}@github.com/${REPOSITORY}.git" && \
-  git config --global http.postBuffer 524288000 && \
-  git config --global init.defaultBranch main && \
+git config --global init.defaultBranch main && \
   git init && \
   git config user.name "${ACTOR}" && \
   git config user.email "${ACTOR}@users.noreply.github.com" && \
   git add . && \
   git commit -m "jekyll build from Action ${GITHUB_SHA}" && \
   git push --force $REMOTE_REPO main:$BRANCH && \
-  fuser -k .git || rm -rf .git && \
+  (fuser -k .git || rm -rf .git) && \
   cd ..
 
-exit $?
+PROVIDER_EXIT_CODE=$?
diff --git a/script/init_environment.sh b/script/init_environment.sh
index 51c1812a..b6c3f5a0 100755
--- a/script/init_environment.sh
+++ b/script/init_environment.sh
@@ -6,6 +6,9 @@ pacman -Syu --noconfirm
 # Installing git package
 pacman -S --noconfirm git
 
+# Installing openssh package
+pacman -S --noconfirm openssh
+
 # Installing ruby libraries
 pacman -S --noconfirm ruby2.7 ruby-bundler