diff --git a/Gemfile b/Gemfile
index c635a19249..85d3de64b7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -72,6 +72,8 @@ gem 'rails-pattern_matching'
 
 # Background jobs
 gem 'sidekiq', '~> 7.3'
+# FIXME(ezekg) connection_pool v3 breaks sidekiq v7's scheduler
+gem 'connection_pool', '< 3'
 gem 'sidekiq-cron', '~> 1.12.0'
 gem 'sidekiq-cronitor', '~> 3.8.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 790bbf6e29..04a9f65479 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,7 +152,7 @@ GEM
       xpath (~> 3.2)
     compact_index (0.15.0)
     concurrent-ruby (1.3.8)
-    connection_pool (3.0.2)
+    connection_pool (2.5.5)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -524,6 +524,7 @@ DEPENDENCIES
   byebug
   clickhouse-activerecord!
   compact_index
+  connection_pool (< 3)
   cucumber (~> 10.2)
   cucumber-rails (~> 4)
   cuke_modeler (~> 3.19)