diff --git a/src/Gemfile.lock b/src/Gemfile.lock
index f40343e..193b682 100644
--- a/src/Gemfile.lock
+++ b/src/Gemfile.lock
@@ -4,7 +4,7 @@ PATH
     dcob (1.0.0)
       octokit (~> 4.3)
       prometheus-client (~> 0.6)
-      sinatra (~> 1.4)
+      sinatra (>= 1.4, < 3.0)
       toml-rb (~> 0.3)
 
 GEM
@@ -19,7 +19,7 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.2.5)
-    faraday (0.12.1)
+    faraday (0.17.0)
       multipart-post (>= 1.2, < 3)
     ffi (1.9.14)
     formatador (0.2.5)
@@ -44,30 +44,32 @@ GEM
       ruby_dep (~> 1.2)
     lumberjack (1.0.10)
     method_source (0.8.2)
-    multipart-post (2.0.0)
+    multipart-post (2.1.1)
+    mustermann (1.0.3)
     nenv (0.3.0)
+    nio4r (2.5.2)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    octokit (4.7.0)
+    octokit (4.14.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parser (2.3.1.4)
       ast (~> 2.2)
     powerpack (0.1.1)
-    prometheus-client (0.7.0)
-      quantile (~> 0.2.0)
+    prometheus-client (0.10.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    quantile (0.2.0)
-    rack (1.6.5)
-    rack-protection (1.5.3)
+    puma (4.2.1)
+      nio4r (~> 2.0)
+    rack (2.0.7)
+    rack-protection (2.0.7)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rainbow (2.1.0)
-    rake (11.3.0)
+    rake (13.0.0)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
@@ -94,17 +96,18 @@ GEM
     ruby-progressbar (1.8.1)
     ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sawyer (0.8.1)
-      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 1.0)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
     shellany (0.0.1)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    sinatra (2.0.7)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.7)
+      tilt (~> 2.0)
     slop (3.6.0)
     thor (0.19.1)
-    tilt (2.0.7)
+    tilt (2.0.10)
     toml-rb (0.3.15)
       citrus (~> 3.0, > 3.0)
     unicode-display_width (1.1.1)
@@ -117,13 +120,14 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bundler (~> 1.12)
+  bundler
   chefstyle (~> 0.4)
   dcob!
   guard
   guard-rspec
+  puma
   rack-test (~> 0.6)
-  rake (~> 11.3)
+  rake (>= 12.0)
   rb-readline
   rspec (~> 3.4)
   webmock (~> 2.1)
diff --git a/src/dcob.gemspec b/src/dcob.gemspec
index 326b1a3..3dc5882 100644
--- a/src/dcob.gemspec
+++ b/src/dcob.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rb-readline"
 
   spec.add_dependency "octokit", "~> 4.3"
-  spec.add_dependency "sinatra", "~> 1.4"
+  spec.add_dependency "sinatra", ">= 1.4", "< 3.0"
   spec.add_dependency "toml-rb", "~> 0.3"
   spec.add_dependency "prometheus-client", "~> 0.6"
 end