diff --git a/lib/sidekiq_unique_jobs/lock_config.rb b/lib/sidekiq_unique_jobs/lock_config.rb
index e40e3e91..c6a592d8 100644
--- a/lib/sidekiq_unique_jobs/lock_config.rb
+++ b/lib/sidekiq_unique_jobs/lock_config.rb
@@ -113,13 +113,13 @@ def errors_as_string
 
     # the strategy to use as conflict resolution from sidekiq client
     def on_client_conflict
-      @on_client_conflict ||= on_conflict["client"] if on_conflict.is_a?(Hash)
+      @on_client_conflict ||= on_conflict["client"] || on_conflict[:client] if on_conflict.is_a?(Hash)
       @on_client_conflict ||= on_conflict
     end
 
     # the strategy to use as conflict resolution from sidekiq server
     def on_server_conflict
-      @on_server_conflict ||= on_conflict["server"] if on_conflict.is_a?(Hash)
+      @on_server_conflict ||= on_conflict["server"] || on_conflict[:server] if on_conflict.is_a?(Hash)
       @on_server_conflict ||= on_conflict
     end
   end