diff --git a/Gemfile.lock b/Gemfile.lock
index 471a758..56f7d29 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -501,7 +501,7 @@ GEM
       nokogiri (~> 1.6)
       rails (~> 5.0)
       rdf
-    rack (2.0.6)
+    rack (2.0.8)
     rack-protection (2.0.1)
       rack
     rack-test (1.0.0)