diff --git a/evaluationserver/Gemfile.lock b/evaluationserver/Gemfile.lock
index 7b6baed4c..7c69f089c 100644
--- a/evaluationserver/Gemfile.lock
+++ b/evaluationserver/Gemfile.lock
@@ -161,7 +161,7 @@ GEM
       ast (~> 2.4.0)
     public_suffix (3.0.2)
     puma (3.12.0)
-    rack (2.0.6)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)