diff --git a/app/controllers/api/v1/grid_weapons_controller.rb b/app/controllers/api/v1/grid_weapons_controller.rb
index 3887e95..63eadbb 100644
--- a/app/controllers/api/v1/grid_weapons_controller.rb
+++ b/app/controllers/api/v1/grid_weapons_controller.rb
@@ -204,7 +204,7 @@ module Api
       def weapon_params
         params.require(:weapon).permit(
           :id, :party_id, :weapon_id,
-          :position, :mainhand, :uncap_level, :element,
+          :position, :mainhand, :uncap_level, :transcendence_step, :element,
           :weapon_key1_id, :weapon_key2_id, :weapon_key3_id,
           :ax_modifier1, :ax_modifier2, :ax_strength1, :ax_strength2,
           :awakening_id, :awakening_level
diff --git a/app/controllers/api/v1/parties_controller.rb b/app/controllers/api/v1/parties_controller.rb
index 7d1287c..35a620d 100644
--- a/app/controllers/api/v1/parties_controller.rb
+++ b/app/controllers/api/v1/parties_controller.rb
@@ -405,7 +405,7 @@ module Api
           summons_attributes: %i[id party_id summon_id position main friend
                                  quick_summon uncap_level transcendence_step],
           weapons_attributes: %i[id party_id weapon_id
-                                 position mainhand uncap_level element
+                                 position mainhand uncap_level transcendence_step element
                                  weapon_key1_id weapon_key2_id weapon_key3_id
                                  ax_modifier1 ax_modifier2 ax_strength1 ax_strength2
                                  awakening_id awakening_level]