diff --git a/Gemfile.lock b/Gemfile.lock
index 46ff6c1..0694e49 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,6 +40,9 @@ GEM
       rack (>= 3.0.0, < 4)
     rack-session (2.0.0)
       rack (>= 3.0.0)
+    rackup (2.1.0)
+      rack (>= 3)
+      webrick (~> 1.8)
     rake (13.2.1)
     ruby2_keywords (0.0.5)
     securerandom (0.3.1)
@@ -73,6 +76,7 @@ GEM
     timeout (0.4.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    webrick (1.8.1)
 
 PLATFORMS
   aarch64-linux-gnu
@@ -89,6 +93,7 @@ PLATFORMS
 DEPENDENCIES
   foreman
   puma
+  rackup (~> 2.1)
   rake
   sinatra
   sinatra-activerecord
@@ -97,4 +102,4 @@ DEPENDENCIES
   timecop (~> 0.9.8)
 
 BUNDLED WITH
-   2.5.3
+   2.5.19