diff --git a/Gemfile.lock b/Gemfile.lock
index 9975b22..1f1e8b5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -550,7 +550,7 @@ GEM
       nokogiri (~> 1.6)
       rails (~> 5.0)
       rdf
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)