diff --git a/lib/with_advisory_lock/concern.rb b/lib/with_advisory_lock/concern.rb
index ad517f1..0d68983 100644
--- a/lib/with_advisory_lock/concern.rb
+++ b/lib/with_advisory_lock/concern.rb
@@ -21,7 +21,7 @@ module ClassMethods
 
       def with_advisory_lock(lock_name, timeout_seconds=nil, &block)
         impl_class = case (connection.adapter_name.downcase)
-          when "postgresql"
+          when "postgresql", "empostgresql"
             WithAdvisoryLock::PostgreSQL
           when "mysql", "mysql2"
             WithAdvisoryLock::MySQL