diff --git a/Gemfile.lock b/Gemfile.lock
index ea97440c977..de141817279 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -233,8 +233,8 @@ GEM
     mini_portile2 (2.8.0)
     mini_racer (0.6.3)
       libv8-node (~> 16.10.0.0)
-    mini_scheduler (0.14.0)
-      sidekiq (>= 4.2.3)
+    mini_scheduler (0.15.0)
+      sidekiq (>= 4.2.3, < 7.0)
     mini_sql (1.4.0)
     mini_suffix (0.3.3)
       ffi (~> 1.9)