diff --git a/code/8/tprov_api/Gemfile.lock b/code/8/tprov_api/Gemfile.lock
index 7ff04f0..280c1cc 100644
--- a/code/8/tprov_api/Gemfile.lock
+++ b/code/8/tprov_api/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     excon (0.71.0)
     multi_json (1.13.1)
     mustermann (1.0.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-protection (2.0.3)
       rack
     redis (4.0.1)