diff --git a/Gemfile.lock b/Gemfile.lock
index 75ab01e..4379eea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    daemons (1.3.1)
+    daemons (1.4.0)
     eventmachine (1.2.7)
     mina (1.2.3)
       open4 (~> 1.3.4)
@@ -9,7 +9,7 @@ GEM
     minitest (5.12.2)
     mustermann (1.0.3)
     open4 (1.3.4)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-protection (2.0.7)
       rack
     rake (12.3.3)
@@ -18,7 +18,7 @@ GEM
       rack (~> 2.0)
       rack-protection (= 2.0.7)
       tilt (~> 2.0)
-    thin (1.7.2)
+    thin (1.8.1)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)