diff --git a/Gemfile.lock b/Gemfile.lock
index 4e14a1ea..11e4bf3c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -655,7 +655,7 @@ GEM
       nokogiri (~> 1.6)
       rails (~> 5.0)
       rdf
-    rack (2.0.7)
+    rack (2.2.3)
     rack-attack (6.0.0)
       rack (>= 1.0, < 3)
     rack-protection (2.0.5)