diff --git a/Gemfile.lock b/Gemfile.lock
index 4f8d3a69..71b85b60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -346,7 +346,7 @@ DEPENDENCIES
   schema_plus_pg_indexes (~> 0.1.12)
   sidekiq (< 6)
   sidekiq-congestion (~> 0.1.0)
-  sidekiq-cron
+  sidekiq-cron (<= 1.8.0)
   simplecov (~> 0.11.2)
   spring (~> 1.7.1)
   spring-commands-rspec (~> 1.0.4)