diff --git a/Gemfile.lock b/Gemfile.lock
index 9721046e3..744ca5f93 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -146,7 +146,7 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.8.0)
     minitest (5.11.3)
     mocha (1.5.0)
       metaclass (~> 0.0.1)
@@ -157,8 +157,9 @@ GEM
     multi_xml (0.6.0)
     mysql2 (0.4.10)
     netrc (0.11.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     parser (2.5.1.0)
       ast (~> 2.4.0)
     pdf-core (0.7.0)
@@ -172,6 +173,7 @@ GEM
       rails (>= 3.1.0)
     prawn-table (0.2.2)
       prawn (>= 1.3.0, < 3.0.0)
+    racc (1.6.0)
     rack (1.6.10)
     rack-protection (1.5.5)
       rack