diff --git a/engines/plos_authors/Gemfile.lock b/engines/plos_authors/Gemfile.lock
index db40dcb53..1b4834344 100644
--- a/engines/plos_authors/Gemfile.lock
+++ b/engines/plos_authors/Gemfile.lock
@@ -7,75 +7,72 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.1.6)
-      actionpack (= 4.1.6)
-      actionview (= 4.1.6)
+    actionmailer (4.1.16)
+      actionpack (= 4.1.16)
+      actionview (= 4.1.16)
       mail (~> 2.5, >= 2.5.4)
-    actionpack (4.1.6)
-      actionview (= 4.1.6)
-      activesupport (= 4.1.6)
+    actionpack (4.1.16)
+      actionview (= 4.1.16)
+      activesupport (= 4.1.16)
       rack (~> 1.5.2)
       rack-test (~> 0.6.2)
-    actionview (4.1.6)
-      activesupport (= 4.1.6)
+    actionview (4.1.16)
+      activesupport (= 4.1.16)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-    activemodel (4.1.6)
-      activesupport (= 4.1.6)
+    activemodel (4.1.16)
+      activesupport (= 4.1.16)
       builder (~> 3.1)
-    activerecord (4.1.6)
-      activemodel (= 4.1.6)
-      activesupport (= 4.1.6)
+    activerecord (4.1.16)
+      activemodel (= 4.1.16)
+      activesupport (= 4.1.16)
       arel (~> 5.0.0)
-    activesupport (4.1.6)
+    activesupport (4.1.16)
       i18n (~> 0.6, >= 0.6.9)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
     arel (5.0.1.20140414130214)
-    builder (3.2.2)
+    builder (3.2.4)
+    concurrent-ruby (1.1.10)
     erubis (2.7.0)
-    hike (1.2.3)
-    i18n (0.6.11)
-    json (1.8.1)
-    mail (2.6.1)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.4.1)
-    minitest (5.4.2)
-    multi_json (1.10.1)
-    rack (1.5.2)
-    rack-test (0.6.2)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (1.8.6)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.1.2)
+    minitest (5.16.3)
+    rack (1.5.5)
+    rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.1.6)
-      actionmailer (= 4.1.6)
-      actionpack (= 4.1.6)
-      actionview (= 4.1.6)
-      activemodel (= 4.1.6)
-      activerecord (= 4.1.6)
-      activesupport (= 4.1.6)
+    rails (4.1.16)
+      actionmailer (= 4.1.16)
+      actionpack (= 4.1.16)
+      actionview (= 4.1.16)
+      activemodel (= 4.1.16)
+      activerecord (= 4.1.16)
+      activesupport (= 4.1.16)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.1.6)
+      railties (= 4.1.16)
       sprockets-rails (~> 2.0)
-    railties (4.1.6)
-      actionpack (= 4.1.6)
-      activesupport (= 4.1.6)
+    railties (4.1.16)
+      actionpack (= 4.1.16)
+      activesupport (= 4.1.16)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (10.3.2)
-    sprockets (2.12.2)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.0)
+    rake (13.0.6)
+    sprockets (3.7.2)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (2.3.3)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
-    thor (0.19.1)
-    thread_safe (0.3.4)
-    tilt (1.4.1)
-    tzinfo (1.2.2)
+    thor (1.2.1)
+    thread_safe (0.3.6)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
 
 PLATFORMS