diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 0000000..a75d638
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,7 @@
+# Utility check for easy testing
+if ENV['FAIL_DANGER']
+    fail("Marking as failed: FAIL_DANGER env set")
+end
+
+# Warn when there is a big PR
+warn("Big PR") if git.lines_of_code > 500
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..8340315
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+gem "danger"
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..5d93923
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,61 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    claide (1.0.3)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
+    colored2 (3.1.2)
+    cork (0.3.0)
+      colored2 (~> 3.1)
+    danger (8.0.5)
+      claide (~> 1.0)
+      claide-plugins (>= 0.9.2)
+      colored2 (~> 3.1)
+      cork (~> 0.1)
+      faraday (>= 0.9.0, < 2.0)
+      faraday-http-cache (~> 2.0)
+      git (~> 1.7)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.0)
+      no_proxy_fix
+      octokit (~> 4.7)
+      terminal-table (~> 1)
+    faraday (1.0.1)
+      multipart-post (>= 1.2, < 3)
+    faraday-http-cache (2.2.0)
+      faraday (>= 0.8)
+    git (1.7.0)
+      rchardet (~> 1.8)
+    kramdown (2.3.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    multipart-post (2.1.1)
+    nap (1.1.0)
+    no_proxy_fix (0.1.2)
+    octokit (4.18.0)
+      faraday (>= 0.9)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    open4 (1.3.4)
+    public_suffix (4.0.5)
+    rchardet (1.8.0)
+    rexml (3.2.4)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.7.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger
+
+BUNDLED WITH
+   2.1.4