Update

Gemfile.lock

       ruby2_keywords (~> 0.0.1)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
-    pg (1.2.2)
+    pg (1.2.3)
     rack (2.2.2)
     rack-protection (2.0.8.1)
       rack
     rake (13.0.1)
-    redis (4.1.3)
-    redis-rack (2.1.2)
-      rack (>= 2.0.8, < 3)
-      redis-store (>= 1.2, < 2)
-    redis-store (1.8.2)
-      redis (>= 4, < 5)
     ruby2_keywords (0.0.2)
     sassc (2.2.1)
       ffi (~> 1.9)
-    sequel (5.30.0)
+    sequel (5.31.0)
     sinatra (2.0.8.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
   pg (~> 1.2)
   rack (~> 2.2)
   rake (~> 13.0)
-  redis-rack (~> 2.1)
   sassc (~> 2.2)
   sequel (~> 5.30)
   sinatra (~> 2.0)
 
 BUNDLED WITH
-   1.17.3
+   2.1.4