diff --git a/.travis.yml b/.travis.yml
index d08e39000..da58ee7ba 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,4 +6,6 @@ notifications:
   slack: rxswift:3ykt2Z61f8GkdvhCZTYPduOL
   email: false
 
-script: ./scripts/pre-release-tests.sh
+script: 
+  - "bundle exec danger --verbose"
+  - ./scripts/pre-release-tests.sh
diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 000000000..e59cb0202
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,32 @@
+# Sometimes it's a README fix, or something like that - which isn't relevant for
+# including in a project's CHANGELOG for example
+declared_trivial = pr_title.include? "#trivial"
+
+# Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+warn("PR is classed as Work in Progress") if pr_title.include? "[WIP]"
+
+# Warn no CHANGELOG
+warn("No CHANGELOG changes made") if lines_of_code > 50 && !modified_files.include?("CHANGELOG.yml") && !declared_trivial
+
+# Warn pod spec changes
+warn("RxCocoa.podspec changed") if modified_files.include?("RxCocoa.podspec")
+warn("RxSwift.podspec changed") if modified_files.include?("RxSwift.podspec")
+warn("RxTests.podspec changed") if modified_files.include?("RxTests.podspec")
+warn("RxBlocking.podspec changed") if modified_files.include?("RxBlocking.podspec")
+
+# Warn summary on pull request
+if pr_body.length < 5
+  warn "Please provide a summary in the Pull Request description"
+end
+
+# If these are all empty something has gone wrong, better to raise it in a comment
+if modified_files.empty? && added_files.empty? && deleted_files.empty?
+  fail "This PR has no changes at all, this is likely a developer issue."
+end
+
+# Warn when there is a big PR
+warn("Big PR") if lines_of_code > 500
+
+# Don't let testing shortcuts get into master by accident
+fail("fdescribe left in tests") if `grep -r fdescribe specs/`.length > 1
+fail("fit left in tests") if `grep -r "fit specs/ `.length > 1
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 000000000..c9c92bd23
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gem 'danger'
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 000000000..062a28323
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,34 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.3.8)
+    claide (1.0.0)
+    colored (1.2)
+    danger (0.7.4)
+      claide
+      colored (~> 1.2)
+      faraday
+      git
+      octokit (~> 4.2)
+      redcarpet (~> 3.3)
+      terminal-table (~> 1)
+    faraday (0.9.1)
+      multipart-post (>= 1.2, < 3)
+    git (1.3.0)
+    multipart-post (2.0.0)
+    octokit (4.3.0)
+      sawyer (~> 0.7.0, >= 0.5.3)
+    redcarpet (3.3.4)
+    sawyer (0.7.0)
+      addressable (>= 2.3.5, < 2.5)
+      faraday (~> 0.8, < 0.10)
+    terminal-table (1.4.5)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger
+
+BUNDLED WITH
+   1.12.5