      gem "md2man", "~>5.1.1", require: false
      gem "binman", "~>5.1.0"
 diff --git a/Gemfile.lock b/Gemfile.lock
-index da341fd344da..f6aa2d0c7a91 100644
+index da341fd3..2e564845 100644
 --- a/Gemfile.lock
 +++ b/Gemfile.lock
-@@ -1,40 +1,40 @@
+@@ -1,41 +1,42 @@
  GEM
    remote: https://rubygems.org/
    specs:

       nokogiri (>= 1.5.9)
     lumberjack (1.0.10)
-    mail (2.6.4)
-      mime-types (>= 1.16, < 4)
+    mail (2.5.4)
+      mime-types (>= 1.16)
+      treetop (~> 1.4.8)
     md2man (5.1.1)
       binman (~> 5.0)
       redcarpet (~> 3.0)
       rouge (~> 1.0)
     method_source (0.8.2)
-    mime-types (3.0)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0221)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    multi_json (1.11.2)
+    mime-types (1.25)
+    mini_portile (0.5.2)
+    minitest (5.7.0)
+    multi_json (1.8.2)


 # If the deployment is done through Puma, include it in the bundle.
-gem "puma", "~> 3.7.0" if ENV["PORTUS_PUMA_DEPLOYMENT"] == "yes" || !packaging?
+gem "puma", "= 2.16.0" if ENV["PORTUS_PUMA_DEPLOYMENT"] == "yes" || !packaging?

 # In order to create the Gemfile.lock required for packaging
 # meaning that it should contain only the production packages
