diff --git a/Gemfile.lock b/Gemfile.lock
index 53a865d..af77be5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,7 @@ GEM
     mutex_m (0.3.0)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    parallel (1.27.0)
+    parallel (1.28.0)
     parser (3.3.11.1)
       ast (~> 2.4.1)
       racc