diff --git a/Gemfile.lock b/Gemfile.lock
index c1b8276ce1..eb1f8e93b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -224,7 +224,7 @@ GEM
       mail (~> 2.7)
     email_validator (2.2.4)
       activemodel
-    erb (5.1.1)
+    erb (5.1.3)
     erubi (1.13.1)
     et-orbi (1.4.0)
       tzinfo
@@ -337,7 +337,7 @@ GEM
       activesupport (>= 3.0)
       nokogiri (>= 1.6)
     io-console (0.8.1)
-    irb (1.15.2)
+    irb (1.15.3)
       pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
@@ -691,7 +691,7 @@ GEM
       readline (~> 0.0)
     rdf-normalize (0.7.0)
       rdf (~> 3.3)
-    rdoc (6.15.0)
+    rdoc (6.15.1)
       erb
       psych (>= 4.0.0)
       tsort