diff --git a/.github/workflows/danger-run.yml b/.github/workflows/danger-run.yml
index 841f9e8..b657245 100644
--- a/.github/workflows/danger-run.yml
+++ b/.github/workflows/danger-run.yml
@@ -8,6 +8,11 @@ on:
         required: false
         type: string
         default: ""
+      gemfile:
+        description: "Gemfile path for Bundler. Leave empty to use the repository's default Gemfile."
+        required: false
+        type: string
+        default: Gemfile
       bundler-cache:
         description: "Use bundler-cache in ruby/setup-ruby."
         required: false
@@ -35,6 +40,8 @@ permissions:
 jobs:
   danger:
     runs-on: ubuntu-latest
+    env:
+      BUNDLE_GEMFILE: ${{ inputs.gemfile }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5197140..8b8b86c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- [#13](https://github.com/numbata/danger-pr-comment/pull/13): Add a `gemfile` input to the Danger Run workflow for selecting a non-default Gemfile - [@dblock](https://github.com/dblock).
 - [#10](https://github.com/numbata/danger-pr-comment/pull/10): Automate release changelog preparation and update workflow tag references in the README, installer, and installer specs - [@dblock](https://github.com/dblock).
 - [#12](https://github.com/numbata/danger-pr-comment/pull/12): Add a version input and restricted access to the release workflow, and reject versions that already exist - [@numbata](https://github.com/numbata).
 
diff --git a/Gemfile b/Gemfile
index 813a236..bbed508 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,5 +16,7 @@ end
 group :test do
   gem 'danger-changelog', '~> 0.8', require: false
   gem 'danger-toc', '~> 0.2', require: false
+  # Temporary until Danger's git 6 support lands: https://github.com/danger/danger/pull/1561
+  gem 'git', '< 6', require: false
   gem 'rspec'
 end
diff --git a/README.md b/README.md
index 7015e20..108d7e0 100644
--- a/README.md
+++ b/README.md
@@ -173,6 +173,7 @@ The `Danger Comment` workflow requires explicit permissions. Reusable workflows
 #### `danger-run.yml`
 
 - `ruby-version`: Ruby version for `ruby/setup-ruby`. Leave empty to use `.ruby-version`/`.tool-versions`.
+- `gemfile`: Gemfile path for Bundler (default `Gemfile`), for example `gemfiles/danger.gemfile`.
 - `bundler-cache`: Enable Bundler caching (default `true`).
 - `danger-args`: Arguments passed to `bundle exec danger` (default `dry_run`).
 - `report-artifact-name`: Artifact name for the report (default `danger-report`).
diff --git a/lib/danger-pr-comment/version.rb b/lib/danger-pr-comment/version.rb
index 7902ea4..01188d3 100644
--- a/lib/danger-pr-comment/version.rb
+++ b/lib/danger-pr-comment/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module DangerPrComment
-  VERSION = '0.1.2'
+  VERSION = '0.2.0'
 end