diff --git a/evaluationserver/Gemfile.lock b/evaluationserver/Gemfile.lock
index d555d8371..4281eacf4 100644
--- a/evaluationserver/Gemfile.lock
+++ b/evaluationserver/Gemfile.lock
@@ -155,7 +155,7 @@ GEM
     public_suffix (3.1.1)
     puma (4.0.1)
       nio4r (~> 2.0)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)