diff --git a/Gemfile.lock b/Gemfile.lock
index aefdc0a6..182afe34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,5 @@
 GIT
-  remote: git://github.com/mimemagicrb/mimemagic.git
+  remote: https://github.com/mimemagicrb/mimemagic.git
   revision: 01f92d86d15d85cfd0f20dabd025dcbd36a8a60f
   ref: 01f92d86d15d85cfd0f20dabd025dcbd36a8a60f
   specs:
@@ -242,7 +242,8 @@ GEM
     multi_json (1.12.1)
     multi_test (0.1.2)
     multi_xml (0.6.0)
-    mustermann (1.0.2)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
@@ -277,12 +278,12 @@ GEM
     public_suffix (4.0.6)
     puma (3.12.0)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-mini-profiler (2.2.0)
       rack (>= 1.2.0)
-    rack-protection (2.0.3)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -361,6 +362,7 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.8.1)
+    ruby2_keywords (0.0.5)
     ruby_http_client (3.3.0)
     ruby_parser (3.15.1)
       sexp_processor (~> 4.9)
@@ -393,10 +395,10 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.0.3)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.3)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sorcerer (1.0.2)
     sprockets (3.7.2)
@@ -411,7 +413,7 @@ GEM
       tins (~> 1.0)
     thor (0.19.4)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tins (1.16.3)
     tinymce-rails (5.0.3)
       railties (>= 3.1.1)