diff --git a/Gemfile.lock b/Gemfile.lock
index ad3acf7..5e81342 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,67 +1,65 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.3.0)
+    ast (2.4.0)
     concurrent-ruby (1.0.5)
     diff-lcs (1.3)
-    faraday (0.13.1)
+    faraday (0.14.0)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.12.2)
       faraday (>= 0.7.4, < 1.0)
-    haml (5.0.2)
+    haml (5.0.4)
       temple (>= 0.8.0)
       tilt
     httmultiparty (0.3.16)
       httparty (>= 0.7.3)
       mimemagic
       multipart-post
-    httparty (0.15.6)
+    httparty (0.16.0)
       multi_xml (>= 0.5.2)
     mimemagic (0.3.2)
     mini_cache (1.1.0)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    mustermann (1.0.1)
-    parallel (1.12.0)
-    parser (2.4.0.0)
-      ast (~> 2.2)
+    mustermann (1.0.2)
+    parallel (1.12.1)
+    parser (2.5.0.0)
+      ast (~> 2.4.0)
     powerpack (0.1.1)
-    puma (3.10.0)
-    rack (2.0.3)
-    rack-protection (2.0.0)
+    puma (3.11.2)
+    rack (2.0.4)
+    rack-protection (2.0.1)
       rack
-    rainbow (2.2.2)
-      rake
-    rake (12.0.0)
-    rspec (3.6.0)
-      rspec-core (~> 3.6.0)
-      rspec-expectations (~> 3.6.0)
-      rspec-mocks (~> 3.6.0)
-    rspec-core (3.6.0)
-      rspec-support (~> 3.6.0)
-    rspec-expectations (3.6.0)
+    rainbow (3.0.0)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-mocks (3.6.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.6.0)
-    rspec-support (3.6.0)
-    rubocop (0.49.1)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
+    rubocop (0.52.1)
       parallel (~> 1.10)
-      parser (>= 2.3.3.1, < 3.0)
+      parser (>= 2.4.0.2, < 3.0)
       powerpack (~> 0.1)
-      rainbow (>= 1.99.1, < 3.0)
+      rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.8.1)
+    ruby-progressbar (1.9.0)
     sentry-api (0.3.3)
       httmultiparty (~> 0.3.16)
-    sentry-raven (2.6.3)
+    sentry-raven (2.7.2)
       faraday (>= 0.7.6, < 1.0)
-    sinatra (2.0.0)
+    sinatra (2.0.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.0)
+      rack-protection (= 2.0.1)
       tilt (~> 2.0)
     temple (0.8.0)
     tilt (2.0.8)
@@ -84,4 +82,4 @@ DEPENDENCIES
   sinatra
 
 BUNDLED WITH
-   1.15.3
+   1.16.1
diff --git a/Makefile b/Makefile
index 96b1a55..da9b60c 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,9 @@ depends: Gemfile
 run: depends
 	./scripts/ruby bundle exec puma
 
+update: Gemfile
+	./scripts/ruby bundle update
+
 check-container: container
 	docker run --rm $(IMAGE_NAME):latest bundle exec puma --version
 
@@ -31,4 +34,4 @@ deploy: container
 clean:
 	rm -rf vendor
 
-.PHONY: all depends clean run check container spec check-container rubocop
+.PHONY: all depends clean run check container update spec check-container rubocop