diff --git a/Gemfile.lock b/Gemfile.lock
index a722c53..1ebf5b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     redis (4.7.1)
     rexml (3.3.7)
     ruby2_keywords (0.0.5)
-    secure_headers (7.0.0)
+    secure_headers (6.7.0)
     sinatra (3.2.0)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)