diff --git a/src/lib/graphql/resolvers.ts b/src/lib/graphql/resolvers.ts
index 7b4f632..bc470e4 100644
--- a/src/lib/graphql/resolvers.ts
+++ b/src/lib/graphql/resolvers.ts
@@ -1913,7 +1913,7 @@ export const resolvers = {
               const catalogs = await partsIndexService.getCatalogs('ru')
               const catalog = catalogs.find(c => c.id === category.partsIndexCatalogId)
               
-              let groupName = null
+              let groupName: string | null = null
               
               // Если есть groupId, получаем группы
               if (category.partsIndexGroupId && catalog) {
@@ -1961,7 +1961,7 @@ export const resolvers = {
         const catalogs = await partsIndexService.getCatalogs('ru')
         const catalog = catalogs.find(c => c.id === category.partsIndexCatalogId)
         
-        let groupName = null
+        let groupName: string | null = null
         
         if (category.partsIndexGroupId && catalog) {
           const groups = await partsIndexService.getCatalogGroups(category.partsIndexCatalogId, 'ru')
@@ -4687,7 +4687,7 @@ export const resolvers = {
         const catalogs = await partsIndexService.getCatalogs('ru')
         const catalog = catalogs.find(c => c.id === category.partsIndexCatalogId)
         
-        let groupName = null
+        let groupName: string | null = null
         if (category.partsIndexGroupId && catalog) {
           const groups = await partsIndexService.getCatalogGroups(category.partsIndexCatalogId, 'ru')
           const group = groups.find(g => g.id === category.partsIndexGroupId)
@@ -4782,7 +4782,7 @@ export const resolvers = {
         const catalogs = await partsIndexService.getCatalogs('ru')
         const catalog = catalogs.find(c => c.id === category.partsIndexCatalogId)
         
-        let groupName = null
+        let groupName: string | null = null
         if (category.partsIndexGroupId && catalog) {
           const groups = await partsIndexService.getCatalogGroups(category.partsIndexCatalogId, 'ru')
           const group = groups.find(g => g.id === category.partsIndexGroupId)