diff --git a/.github/workflows/release_image.yml b/.github/workflows/release_image.yml
index 3d2232b..927b9f2 100644
--- a/.github/workflows/release_image.yml
+++ b/.github/workflows/release_image.yml
@@ -9,9 +9,10 @@ on:
     inputs:
       increment:
         description: Increment
-        default: minor
+        default: "null"
         type: choice
         options:
+          - "null"
           - major
           - minor
           - patch
diff --git a/script/release-workflow/git-commit.sh b/script/release-workflow/git-commit.sh
new file mode 100755
index 0000000..5f700d5
--- /dev/null
+++ b/script/release-workflow/git-commit.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -euo >/dev/null
+
+if [[ $(git status --porcelain) ]]; then
+    git add Gemfile.lock VERSION lib/pact/cli/version.rb
+    git commit -m "chore(release): version ${TAG}"
+fi
\ No newline at end of file
diff --git a/script/release-workflow/next-docker-tag.sh b/script/release-workflow/next-docker-tag.sh
index 3c76a34..b86be69 100755
--- a/script/release-workflow/next-docker-tag.sh
+++ b/script/release-workflow/next-docker-tag.sh
@@ -2,9 +2,15 @@
 
 set -eu
 
-gem_version_from_gemfile_lock() {
-  grep "pact_broker (" pact_broker/Gemfile.lock | awk -F '[()]' '{print $2}'
-}
+# If increment in null, then use the existing version number
+# and just increase `n` by 1 in semver version x.y.z.n 
+# as set in .github./workflows/release_image.yml
+# as set in script/release.sh
+if [ "${INCREMENT:-}" ]; then
+  if [ "${INCREMENT:-}" != "null" ]; then
+    bundle exec bump ${INCREMENT:-minor} --no-commit --replace-in $PWD/lib/pact/cli/version.rb > /dev/null
+  fi
+fi
 
 gem_version=$(ruby -I lib -e "require 'pact/cli/version.rb'; puts Pact::Cli::VERSION")
 existing_tags=$(git tag)
diff --git a/script/release-workflow/run.sh b/script/release-workflow/run.sh
index e91c2cc..249887e 100755
--- a/script/release-workflow/run.sh
+++ b/script/release-workflow/run.sh
@@ -17,4 +17,5 @@ ${script_dir}/docker-build.sh
 ${script_dir}/scan.sh
 ${script_dir}/prepare-release.sh
 ${script_dir}/docker-push.sh
+${script_dir}/git-commit.sh
 ${script_dir}/git-push.sh