diff --git a/.circleci/config.yml b/.circleci/config.yml
index efb245aaf..2a2e7926c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -22,10 +22,14 @@ jobs:
           name: Install Dependencies
           command: |
             bundle config build.sqlite3 --with-sqlite3-dir=/opt/local
+            brew install swiftlint
             bundle install --path vendor/bundle
       - run:
           name: Run tests
           command: bundle exec rake test
+      - run:
+          name: Danger
+          command: bundle exec danger
       - run:
           name: Send test coverage report
           command: bash <(curl -s https://codecov.io/bash)
diff --git a/.swiftlint.yml b/.swiftlint.yml
new file mode 100644
index 000000000..5e2b60cf9
--- /dev/null
+++ b/.swiftlint.yml
@@ -0,0 +1,16 @@
+included:
+  - App/xcbuddykit/Sources
+  - App/Sources
+excluded:
+  - Sources
+  - Tests
+  - .build
+disabled_rules:
+  - trailing_whitespace
+  - nesting
+  - cyclomatic_complexity
+  - file_length
+  - todo
+line_length:
+  warning: 150
+  error: 170
diff --git a/App.xcodeproj/project.pbxproj b/App.xcodeproj/project.pbxproj
index de78a035b..6e7c78ae9 100644
--- a/App.xcodeproj/project.pbxproj
+++ b/App.xcodeproj/project.pbxproj
@@ -745,6 +745,7 @@
 			buildPhases = (
 				B915ED152063AFBC004B6630 /* Sources */,
 				B915ED162063AFBC004B6630 /* Frameworks */,
+				B918A2322093756700E64FBE /* Swift lint */,
 			);
 			buildRules = (
 			);
@@ -904,6 +905,20 @@
 			shellPath = /bin/sh;
 			shellScript = "if which sentry-cli >/dev/null; then\nexport SENTRY_ORG=xcbuddy\nexport SENTRY_PROJECT=app\nERROR=$(bin/sentry-cli upload-dsym 2>&1 >/dev/null)\nif [ ! $? -eq 0 ]; then\necho \"warning: sentry-cli - $ERROR\"\nfi\nelse\necho \"warning: sentry-cli not installed, download from https://github.com/getsentry/sentry-cli/releases\"\nfi";
 		};
+		B918A2322093756700E64FBE /* Swift lint */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Swift lint";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "if which swiftlint >/dev/null; then\nswiftlint\nelse\necho \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi";
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
diff --git a/App/xcbuddykit/Sources/Extensions/AbsolutePath+Extras.swift b/App/xcbuddykit/Sources/Extensions/AbsolutePath+Extras.swift
index 3f090191a..ebe44eb43 100644
--- a/App/xcbuddykit/Sources/Extensions/AbsolutePath+Extras.swift
+++ b/App/xcbuddykit/Sources/Extensions/AbsolutePath+Extras.swift
@@ -2,7 +2,7 @@ import Basic
 import Darwin
 import Foundation
 
-let system_glob = Darwin.glob
+let systemGlob = Darwin.glob
 
 extension AbsolutePath {
     static var current: AbsolutePath {
@@ -18,7 +18,7 @@ extension AbsolutePath {
         }
 
         let flags = GLOB_TILDE | GLOB_BRACE | GLOB_MARK
-        if system_glob(cPattern, flags, nil, &gt) == 0 {
+        if systemGlob(cPattern, flags, nil, &gt) == 0 {
             let matchc = gt.gl_matchc
             return (0 ..< Int(matchc)).compactMap { index in
                 if let path = String(validatingUTF8: gt.gl_pathv[index]!) {
diff --git a/App/xcbuddykit/Sources/Loader/GraphManifestLoader.swift b/App/xcbuddykit/Sources/Loader/GraphManifestLoader.swift
index c110b7903..36995d2fe 100644
--- a/App/xcbuddykit/Sources/Loader/GraphManifestLoader.swift
+++ b/App/xcbuddykit/Sources/Loader/GraphManifestLoader.swift
@@ -62,7 +62,10 @@ class GraphManifestLoader: GraphManifestLoading {
         }
         let swiftPath = AbsolutePath(swiftOutput)
         let manifestFrameworkPath = try context.resourceLocator.projectDescription()
-        let jsonString: String! = try context.shell.run(swiftPath.asString, "-F", manifestFrameworkPath.parentDirectory.asString, "-framework", "ProjectDescription", path.asString, "--dump").chuzzle()
+        let jsonString: String! = try context.shell.run(swiftPath.asString, "-F",
+                                                        manifestFrameworkPath.parentDirectory.asString,
+                                                        "-framework", "ProjectDescription",
+                                                        path.asString, "--dump").chuzzle()
         if jsonString == nil {
             throw GraphManifestLoaderError.unexpectedOutput(path)
         }
diff --git a/App/xcbuddykit/Sources/Loader/GraphNode.swift b/App/xcbuddykit/Sources/Loader/GraphNode.swift
index 01a3f3a04..58032b6d2 100644
--- a/App/xcbuddykit/Sources/Loader/GraphNode.swift
+++ b/App/xcbuddykit/Sources/Loader/GraphNode.swift
@@ -138,7 +138,7 @@ class PrecompiledNode: GraphNode {
     /// - armv7: armv7 (OS device)
     /// - armv7s: armv7s (OS device)
     enum Architecture: String {
-        case x86_64
+        case x8664 = "x86_64"
         case i386
         case armv7
         case armv7s
diff --git a/App/xcbuddykit/Sources/Updater/SPUStandardUpdaterController+App.swift b/App/xcbuddykit/Sources/Updater/SPUStandardUpdaterController+App.swift
index 410b48d49..285fb2cd8 100644
--- a/App/xcbuddykit/Sources/Updater/SPUStandardUpdaterController+App.swift
+++ b/App/xcbuddykit/Sources/Updater/SPUStandardUpdaterController+App.swift
@@ -1,7 +1,7 @@
 import Foundation
 import Sparkle
 
-fileprivate var _app: SPUStandardUpdaterController!
+private var _app: SPUStandardUpdaterController!
 
 // MARK: - SPUStandardUpdaterController (App)
 
diff --git a/App/xcbuddykit/Sources/Updater/SPUUpdater+CommandLine.swift b/App/xcbuddykit/Sources/Updater/SPUUpdater+CommandLine.swift
index d5ca3db90..ddad96686 100644
--- a/App/xcbuddykit/Sources/Updater/SPUUpdater+CommandLine.swift
+++ b/App/xcbuddykit/Sources/Updater/SPUUpdater+CommandLine.swift
@@ -54,7 +54,9 @@ class SPUCommandLineUserDriver: NSObject, SPUUserDriver {
         }
     }
 
-    func showInformationalUpdateFound(with appcastItem: SUAppcastItem, userInitiated _: Bool, reply: @escaping (SPUInformationalUpdateAlertChoice) -> Void) {
+    func showInformationalUpdateFound(with appcastItem: SUAppcastItem,
+                                      userInitiated _: Bool,
+                                      reply: @escaping (SPUInformationalUpdateAlertChoice) -> Void) {
         DispatchQueue.main.async {
             print("Found information for new update: %s", appcastItem.infoURL.absoluteString.utf8)
             reply(.dismissInformationalNoticeChoice)
diff --git a/App/xcbuddykit/Sources/Utils/Bundles.swift b/App/xcbuddykit/Sources/Utils/Bundles.swift
index e6354922d..3e2003862 100644
--- a/App/xcbuddykit/Sources/Utils/Bundles.swift
+++ b/App/xcbuddykit/Sources/Utils/Bundles.swift
@@ -1,7 +1,7 @@
 import Basic
 import Foundation
 
-fileprivate class Dummy {}
+private class Dummy {}
 
 enum BundleError: Error {
     case frameworkNotEmbedded(AbsolutePath)
diff --git a/App/xcbuddykit/Sources/Utils/ErrorHandler.swift b/App/xcbuddykit/Sources/Utils/ErrorHandler.swift
index d0420c8bb..cd853e823 100644
--- a/App/xcbuddykit/Sources/Utils/ErrorHandler.swift
+++ b/App/xcbuddykit/Sources/Utils/ErrorHandler.swift
@@ -57,8 +57,10 @@ final class ErrorHandler: ErrorHandling {
     /// - Parameter printer: printer.
     init(printer: Printing = Printer()) {
         if let sentryDsn = Bundle(for: ErrorHandler.self).infoDictionary?["SENTRY_DSN"] as? String, !sentryDsn.isEmpty {
+            // swiftlint:disable force_try
             client = try! Client(dsn: sentryDsn)
             try! client?.startCrashHandler()
+            // swiftlint:enable force_try
         } else {
             client = nil
         }
diff --git a/App/xcbuddykit/Sources/Utils/Printer.swift b/App/xcbuddykit/Sources/Utils/Printer.swift
index 0e877fc18..8d48883d3 100644
--- a/App/xcbuddykit/Sources/Utils/Printer.swift
+++ b/App/xcbuddykit/Sources/Utils/Printer.swift
@@ -26,7 +26,9 @@ protocol Printing: AnyObject {
 
 /// Default printer that conforms the printing protocol.
 class Printer: Printing {
+    // swiftlint:disable force_cast
     let terminalController: TerminalController = TerminalController(stream: stdoutStream as! LocalFileOutputByteStream)!
+    // swiftlint:enable force_cast
 
     /// Prints a message on the console.
     ///
diff --git a/App/xcbuddykit/Tests/Loader/GraphNodeTests.swift b/App/xcbuddykit/Tests/Loader/GraphNodeTests.swift
index fcf00d5df..7a4ea5c43 100644
--- a/App/xcbuddykit/Tests/Loader/GraphNodeTests.swift
+++ b/App/xcbuddykit/Tests/Loader/GraphNodeTests.swift
@@ -12,7 +12,7 @@ final class PrecompiledNodeTests: XCTestCase {
     }
 
     func test_architecture_rawValues() {
-        XCTAssertEqual(PrecompiledNode.Architecture.x86_64.rawValue, "x86_64")
+        XCTAssertEqual(PrecompiledNode.Architecture.x8664.rawValue, "x86_64")
         XCTAssertEqual(PrecompiledNode.Architecture.i386.rawValue, "i386")
         XCTAssertEqual(PrecompiledNode.Architecture.armv7.rawValue, "armv7")
         XCTAssertEqual(PrecompiledNode.Architecture.armv7s.rawValue, "armv7s")
@@ -42,7 +42,7 @@ final class FrameworkNodeTests: XCTestCase {
             }
             return ""
         }
-        try XCTAssertEqual(subject.architectures(shell: shell).first, .x86_64)
+        try XCTAssertEqual(subject.architectures(shell: shell).first, .x8664)
     }
 
     func test_linking() {
@@ -79,7 +79,7 @@ final class LibraryNodeTests: XCTestCase {
             }
             return ""
         }
-        try XCTAssertEqual(subject.architectures(shell: shell).first, .x86_64)
+        try XCTAssertEqual(subject.architectures(shell: shell).first, .x8664)
     }
 
     func test_linking() {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25b562eee..45a993467 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Please, check out guidelines: https://keepachangelog.com/en/1.0.0/
 * Base context https://github.com/xcbuddy/xcbuddy/pull/17/files by @pepibumur.
 * Add `ResourceLocator` https://github.com/xcbuddy/xcbuddy/pull/18 by @pepibumur.
 * Add `ErrorHandler` https://github.com/xcbuddy/xcbuddy/pull/20 by @pepibumur.
+* Add Danger https://github.com/xcbuddy/xcbuddy/pull/21 by @pepibumur.
 
 ### Changed
 
diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 000000000..93a4d5341
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,2 @@
+# Swift lint
+swiftlint.lint_files
diff --git a/Gemfile b/Gemfile
index 30bba7db0..1d2b83c9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,3 +13,5 @@ gem 'rake'
 gem 'rubocop'
 gem 'semantic'
 gem 'sparklecast'
+gem 'danger'
+gem 'danger-swiftlint'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 998de773e..8e49954fe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,6 +13,10 @@ GEM
     atomos (0.1.2)
     byebug (10.0.1)
     claide (1.0.2)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
     cocoapods (1.4.0)
       activesupport (>= 4.0.2, < 5)
       claide (>= 1.0.2, < 2.0)
@@ -48,10 +52,30 @@ GEM
     cocoapods-try (1.1.0)
     colored2 (3.1.2)
     concurrent-ruby (1.0.5)
+    cork (0.3.0)
+      colored2 (~> 3.1)
+    danger (5.5.12)
+      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)
+      no_proxy_fix
+      octokit (~> 4.7)
+      terminal-table (~> 1)
+    danger-swiftlint (0.16.0)
+      danger
+      rake (> 10)
+      thor (~> 0.19)
     dotenv (2.2.1)
     escape (0.0.4)
     faraday (0.14.0)
       multipart-post (>= 1.2, < 3)
+    faraday-http-cache (1.3.1)
+      faraday (~> 0.8)
     ffi (1.9.23)
     fourflusher (2.0.1)
     fuzzy_match (2.0.4)
@@ -68,6 +92,7 @@ GEM
       sass (~> 3.4)
       sqlite3 (~> 1.3)
       xcinvoke (~> 0.3.0)
+    kramdown (1.16.2)
     liferaft (0.0.6)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -77,6 +102,7 @@ GEM
     nanaimo (0.2.3)
     nap (1.1.0)
     netrc (0.11.0)
+    no_proxy_fix (0.1.2)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     octokit (4.8.0)
@@ -115,6 +141,9 @@ GEM
     sparklecast (0.0.1)
       nokogiri
     sqlite3 (1.3.13)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    thor (0.20.0)
     thread_safe (0.3.6)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
@@ -133,6 +162,8 @@ PLATFORMS
 
 DEPENDENCIES
   byebug
+  danger
+  danger-swiftlint
   dotenv
   git
   jazzy