diff --git a/Gemfile.lock b/Gemfile.lock
index 2b5d343..5c6074b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rdf (3.1.3)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)