diff --git a/lib/torque/postgresql/reflection/belongs_to_many_reflection.rb b/lib/torque/postgresql/reflection/belongs_to_many_reflection.rb
index 5fe59b1..ad65e69 100644
--- a/lib/torque/postgresql/reflection/belongs_to_many_reflection.rb
+++ b/lib/torque/postgresql/reflection/belongs_to_many_reflection.rb
@@ -25,7 +25,7 @@ def association_class
         end
 
         def foreign_key
-          @foreign_key ||= options[:foreign_key] || derive_foreign_key.freeze
+          @foreign_key ||= options[:foreign_key]&.to_s || derive_foreign_key.freeze
         end
 
         def association_foreign_key
@@ -33,7 +33,7 @@ def association_foreign_key
         end
 
         def active_record_primary_key
-          @active_record_primary_key ||= options[:primary_key] || derive_primary_key
+          @active_record_primary_key ||= options[:primary_key]&.to_s || derive_primary_key
         end
 
         def join_primary_key(*)
diff --git a/lib/torque/postgresql/version.rb b/lib/torque/postgresql/version.rb
index dbe3fb9..309f276 100644
--- a/lib/torque/postgresql/version.rb
+++ b/lib/torque/postgresql/version.rb
@@ -2,6 +2,6 @@
 
 module Torque
   module PostgreSQL
-    VERSION = '2.4.3'
+    VERSION = '2.4.4'
   end
 end
diff --git a/spec/tests/belongs_to_many_spec.rb b/spec/tests/belongs_to_many_spec.rb
index 8ddecbf..da02ca1 100644
--- a/spec/tests/belongs_to_many_spec.rb
+++ b/spec/tests/belongs_to_many_spec.rb
@@ -20,6 +20,14 @@
 
       model.belongs_to_many(:tests)
     end
+
+    it 'allows setting up foreign key and primary_key as symbol' do
+      model.belongs_to_many(:tests, foreign_key: :test_ids, primary_key: :test_id)
+
+      reflection = model._reflections['tests']
+      expect(reflection.foreign_key).to be_eql('test_ids')
+      expect(reflection.active_record_primary_key).to be_eql('test_id')
+    end
   end
 
   context 'on association' do