diff --git a/Gemfile.lock b/Gemfile.lock
index e2548a85..dca06e5c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,8 +71,8 @@ GEM
       pry (>= 0.13, < 0.15)
     racc (1.6.2)
     rack (2.2.8)
-    rack-protection (3.0.6)
-      rack
+    rack-protection (3.1.0)
+      rack (~> 2.2, >= 2.2.4)
     rack-ssl-enforcer (0.2.9)
     rack-test (2.1.0)
       rack (>= 1.3)
@@ -92,16 +92,16 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sinatra (3.0.6)
+    sinatra (3.1.0)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.0.6)
+      rack-protection (= 3.1.0)
       tilt (~> 2.0)
-    sinatra-contrib (3.0.6)
+    sinatra-contrib (3.1.0)
       multi_json
       mustermann (~> 3.0)
-      rack-protection (= 3.0.6)
-      sinatra (= 3.0.6)
+      rack-protection (= 3.1.0)
+      sinatra (= 3.1.0)
       tilt (~> 2.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -122,7 +122,7 @@ GEM
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thor (1.2.2)
-    tilt (2.0.11)
+    tilt (2.2.0)
     tty-pager (0.14.0)
       strings (~> 0.2.0)
       tty-screen (~> 0.8)