diff --git a/update_deps.sh b/update_deps.sh
new file mode 100755
index 0000000..b6d4df2
--- /dev/null
+++ b/update_deps.sh
@@ -0,0 +1,84 @@
+#!/bin/bash
+
+#
+# Update node Docker image and npm dependencies and run tests
+#
+
+set -o errexit  # Exit immediately if any command or pipeline of commands fails
+set -o errtrace # Inherit ERR trap in functions, subshells and substitutions
+set -o nounset  # Treat unset variables and parameters as an error
+set -o pipefail # Exit when command before pipe fails
+set -o xtrace   # Debug mode expand everything and print it before execution
+
+cd "$(dirname "$0")" # Always run from script location
+
+test_image() {
+    docker build -t zemanlx/remark-lint .
+    docker run --rm -i -v "${PWD}:/lint/input:ro" zemanlx/remark-lint --frail .
+}
+
+branch="update/$(date --utc '+%Y-%m-%d')"
+
+# Make sure we branch from the latest master
+git reset --quiet --hard HEAD
+git checkout --quiet master
+git pull --quiet
+
+# Delete that local branch if it already exist and create it again to start
+# from scratch
+if git show-ref --quiet --verify "refs/heads/${branch}"; then
+    git branch --quiet --delete --force "${branch}"
+fi
+git checkout --quiet -b "${branch}"
+
+#
+# Update docker image
+#
+
+# Get latest tag of node LTS (10, 12, 14, etc.) version of node Docker image
+# based on alpine
+image_tag=$(curl 'https://hub.docker.com/v2/repositories/library/node/tags/?page_size=50&page=1&name=alpine' \
+    | jq -r '.results[].name' \
+    | grep -E "^($(seq --separator "|" 10 2 200))\.[0-9]+\.[0-9]-alpine[0-9]+\.[0-9]+$" \
+    | sort -t "." -k1n -k2n -k3n -k4n \
+    | tail -n 1)
+
+# Get major and minor version of git package for image_tag
+git_version=$(docker run -i --rm "node:${image_tag}" apk --no-cache --quiet list 'git' | sed -r 's/^git-([0-9]+\.[0-9]+).*/\1/')
+
+sed -i -r "s/^(FROM node:).+$/\1${image_tag}/" Dockerfile
+sed -i -r "s/(git~=)[0-9]+.[0-9]+/\1${git_version}/" Dockerfile
+
+# If there were any changes to the Dockerfile, test it and commit them
+if ! git diff --quiet Dockerfile; then
+    test_image
+    git add Dockerfile
+    git commit --message "Update Docker image: ${image_tag} and git: ${git_version}"
+fi
+
+#
+# Update npm dependencies
+#
+
+# Install current dependencies to do not duplicated packages in 'npm outdated'
+docker run --rm -i --volume "${PWD}:${PWD}" --workdir "${PWD}" "node:${image_tag}" \
+    ash -c 'npm install && chown '"$(id -u):$(id -g)"' -R .'
+
+# Update package.json to latest dependencies
+if ! docker run --rm -i --volume "${PWD}:${PWD}" --workdir "${PWD}" "node:${image_tag}" \
+    npm outdated; then
+
+    docker run --rm -i --volume "${PWD}:${PWD}" --workdir "${PWD}" "node:${image_tag}" \
+        ash -c 'for pkg in $(sed -nr '\''s/.*"(.*)": ".*",*/\1/p'\'' package.json);do npm install --save-exact "${pkg}@latest";done && chown '"$(id -u):$(id -g)"' -R .'
+fi
+
+# Update package-lock.json
+docker run --rm -i --volume "${PWD}:${PWD}" --workdir "${PWD}" "node:${image_tag}" \
+    ash -c 'npm update && chown '"$(id -u):$(id -g)"' -R .'
+
+# If there were any changes to the Dockerfile, test it and commit them
+if ! git diff --quiet package.json package-lock.json; then
+    test_image
+    git add package.json package-lock.json
+    git commit --message "Update npm packages and its dependencies"
+fi