diff --git a/Gemfile.lock b/Gemfile.lock
index f2454f1..7025c5d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,12 +7,14 @@ GEM
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
     method_source (0.8.2)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     pry (0.10.3)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (10.5.0)
     rb-fsevent (0.9.7)
@@ -21,12 +23,14 @@ GEM
     rerun (0.11.0)
       listen (~> 3.0)
     ruby-openid (2.7.0)
-    sinatra (1.4.7)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     slop (3.6.0)
-    tilt (2.0.2)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby