diff --git a/app/controllers/api/v1/collection_artifacts_controller.rb b/app/controllers/api/v1/collection_artifacts_controller.rb
index a89170a..50fd188 100644
--- a/app/controllers/api/v1/collection_artifacts_controller.rb
+++ b/app/controllers/api/v1/collection_artifacts_controller.rb
@@ -120,10 +120,10 @@ module Api
 
         render json: {
           success: result.success?,
-          created: result.created.size,
-          updated: result.updated.size,
-          skipped: result.skipped.size,
-          errors: result.errors
+          created: result.created&.size || 0,
+          updated: result.updated&.size || 0,
+          skipped: result.skipped&.size || 0,
+          errors: result.errors || []
         }, status: status
       end
 
@@ -176,7 +176,10 @@ module Api
       end
 
       def import_params
-        params.permit(:update_existing, data: {})
+        {
+          update_existing: params[:update_existing],
+          data: params[:data]&.to_unsafe_h
+        }
       end
     end
   end
diff --git a/app/controllers/api/v1/collection_characters_controller.rb b/app/controllers/api/v1/collection_characters_controller.rb
index ae0738a..43ff811 100644
--- a/app/controllers/api/v1/collection_characters_controller.rb
+++ b/app/controllers/api/v1/collection_characters_controller.rb
@@ -196,7 +196,10 @@ module Api
       end
 
       def import_params
-        params.permit(:update_existing, data: {})
+        {
+          update_existing: params[:update_existing],
+          data: params[:data]&.to_unsafe_h
+        }
       end
     end
   end
diff --git a/app/controllers/api/v1/collection_summons_controller.rb b/app/controllers/api/v1/collection_summons_controller.rb
index b9739f8..673ac97 100644
--- a/app/controllers/api/v1/collection_summons_controller.rb
+++ b/app/controllers/api/v1/collection_summons_controller.rb
@@ -167,7 +167,10 @@ module Api
       end
 
       def import_params
-        params.permit(:update_existing, data: {})
+        {
+          update_existing: params[:update_existing],
+          data: params[:data]&.to_unsafe_h
+        }
       end
     end
   end
diff --git a/app/controllers/api/v1/collection_weapons_controller.rb b/app/controllers/api/v1/collection_weapons_controller.rb
index fb77b75..ad1cfc5 100644
--- a/app/controllers/api/v1/collection_weapons_controller.rb
+++ b/app/controllers/api/v1/collection_weapons_controller.rb
@@ -177,7 +177,10 @@ module Api
       end
 
       def import_params
-        params.permit(:update_existing, data: {})
+        {
+          update_existing: params[:update_existing],
+          data: params[:data]&.to_unsafe_h
+        }
       end
     end
   end