diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 0000000..a3c2db4
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,14 @@
+# Check to see if any changes were made to Spruce library
+has_library_changes = !git.modified_files.grep(/Sources/).empty?
+
+# warn if this PR is above 200 lines
+warn("Big PR") if git.lines_of_code > 200
+
+# check to see if the changelog has been updated
+no_changelog_entry = !git.modified_files.include?("Changelog.md")
+if has_app_changes && no_changelog_entry
+  fail("Any changes to the Spruce library need to be documented in the Changelog")
+end
+
+# Run SwiftLint
+swiftlint.lint_files
diff --git a/Gemfile b/Gemfile
index c6ba4bb..ff7748c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,3 +4,4 @@ gem 'fastlane'
 gem 'cocoapods'
 gem 'slather'
 gem 'coveralls', require: false
+gem 'danger'
diff --git a/Gemfile.lock b/Gemfile.lock
index 050a52d..0b4e808 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,6 +12,10 @@ GEM
       public_suffix (~> 2.0, >= 2.0.2)
     babosa (1.0.2)
     claide (1.0.1)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
     clamp (0.6.5)
     cocoapods (1.2.0)
       activesupport (>= 4.0.2, < 5)
@@ -47,14 +51,28 @@ GEM
       netrc (= 0.7.8)
     cocoapods-try (1.1.0)
     colored (1.2)
+    colored2 (3.1.2)
     commander (4.4.3)
       highline (~> 1.7.2)
+    cork (0.2.0)
+      colored (~> 1.2)
     coveralls (0.8.19)
       json (>= 1.8, < 3)
       simplecov (~> 0.12.0)
       term-ansicolor (~> 1.3)
       thor (~> 0.19.1)
       tins (~> 1.6)
+    danger (4.3.0)
+      claide (~> 1.0)
+      claide-plugins (>= 0.9.2)
+      colored2 (~> 3.1)
+      cork (~> 0.1)
+      faraday (~> 0.9)
+      faraday-http-cache (~> 1.0)
+      git (~> 1)
+      kramdown (~> 1.5)
+      octokit (~> 4.2)
+      terminal-table (~> 1)
     docile (1.1.5)
     domain_name (0.5.20161129)
       unf (>= 0.0.5, < 1.0.0)
@@ -66,6 +84,8 @@ GEM
     faraday-cookie_jar (0.0.6)
       faraday (>= 0.7.4)
       http-cookie (~> 1.0.0)
+    faraday-http-cache (1.3.1)
+      faraday (~> 0.8)
     faraday_middleware (0.11.0.1)
       faraday (>= 0.7.4, < 1.0)
     fastimage (2.0.1)
@@ -104,6 +124,7 @@ GEM
     fourflusher (2.0.1)
     fuzzy_match (2.0.4)
     gh_inspector (1.0.3)
+    git (1.3.0)
     google-api-client (0.9.28)
       addressable (~> 2.3)
       googleauth (~> 0.5)
@@ -129,6 +150,7 @@ GEM
     i18n (0.8.0)
     json (1.8.3)
     jwt (1.5.6)
+    kramdown (1.13.2)
     little-plugger (1.1.4)
     logging (2.1.0)
       little-plugger (~> 1.1)
@@ -149,6 +171,9 @@ GEM
     netrc (0.7.8)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
+    octokit (4.6.2)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    open4 (1.3.4)
     os (0.9.6)
     plist (3.2.0)
     public_suffix (2.0.5)
@@ -158,6 +183,9 @@ GEM
     rouge (1.11.1)
     ruby-macho (0.2.6)
     rubyzip (1.2.1)
+    sawyer (0.8.1)
+      addressable (>= 2.3.5, < 2.6)
+      faraday (~> 0.8, < 1.0)
     security (0.1.3)
     signet (0.7.3)
       addressable (~> 2.3)
@@ -208,6 +236,7 @@ PLATFORMS
 DEPENDENCIES
   cocoapods
   coveralls
+  danger
   fastlane
   slather
 
diff --git a/circle.yml b/circle.yml
index d37c190..b3407d1 100644
--- a/circle.yml
+++ b/circle.yml
@@ -7,6 +7,7 @@ general:
 test:
   override:
     - gem install bundler
+    - bundle exec danger
     - bundle exec fastlane run_tests
   post:
     - bundle exec slather