diff --git a/Gemfile.lock b/Gemfile.lock
index 7bd4cfb..05cec18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,26 +1,28 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    daemons (1.2.3)
-    eventmachine (1.0.8)
-    mina (0.3.7)
+    daemons (1.2.6)
+    eventmachine (1.2.5)
+    mina (1.2.3)
       open4 (~> 1.3.4)
       rake
-    minitest (5.7.0)
+    minitest (5.11.3)
+    mustermann (1.0.2)
     open4 (1.3.4)
-    rack (1.6.4)
-    rack-protection (1.5.3)
+    rack (2.0.4)
+    rack-protection (2.0.1)
       rack
-    rake (10.4.2)
-    sinatra (1.4.6)
-      rack (~> 1.4)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    thin (1.6.3)
+    rake (12.3.1)
+    sinatra (2.0.1)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.1)
+      tilt (~> 2.0)
+    thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
-      eventmachine (~> 1.0)
-      rack (~> 1.0)
-    tilt (2.0.1)
+      eventmachine (~> 1.0, >= 1.0.4)
+      rack (>= 1, < 3)
+    tilt (2.0.8)
 
 PLATFORMS
   ruby
@@ -32,4 +34,4 @@ DEPENDENCIES
   thin
 
 BUNDLED WITH
-   1.10.5
+   1.16.1