diff --git a/Gemfile.lock b/Gemfile.lock
index 57c553cd..761a2ff8 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: d5ebc0cd846dcc68142622c76ad71d021768b7c2
   ref: d5ebc0cd846dcc68142622c76ad71d021768b7c2
   specs:
@@ -264,7 +264,7 @@ GEM
     net-ssh (5.2.0)
     net-ssh-gateway (2.0.0)
       net-ssh (>= 4.0.0)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     nori (2.6.0)
@@ -290,7 +290,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.1)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     rack (1.6.12)
     rack-attack (6.2.1)