diff --git a/interfaces/IItem/index.js b/interfaces/IItem/index.js
index 322b859..75d11bd 100644
--- a/interfaces/IItem/index.js
+++ b/interfaces/IItem/index.js
@@ -12,7 +12,7 @@ class IItem extends ETInterface {
       url,
       qs: {
         app_id: appId,
-        sku: sku.toString(),
+        sku: sku ? sku.toString() : undefined,
         name,
         page,
         per_page: perPage,
@@ -84,7 +84,7 @@ class IItem extends ETInterface {
       url,
       qs: {
         app_id: appId,
-        def_id_filter: defIdFilter.toString(),
+        def_id_filter: defIdFilter ? defIdFilter.toString() : undefined,
         index_by: indexBy,
         page,
         per_page: perPage
@@ -110,7 +110,7 @@ class IItem extends ETInterface {
 
     const res = await this.request.get({
       url,
-      qs: { app_id: appId, def_id: defId.toString() }
+      qs: { app_id: appId, def_id: defId ? defId.toString() : undefined }
     })
 
     if (!res.response) {
diff --git a/interfaces/ITrade/index.js b/interfaces/ITrade/index.js
index 965e219..3479b0b 100644
--- a/interfaces/ITrade/index.js
+++ b/interfaces/ITrade/index.js
@@ -67,7 +67,14 @@ class ITrade extends ETInterface {
 
     const res = await this.request.get({
       url,
-      qs: { uid, state, type, page, per_page: perPage, ids: ids.toString() }
+      qs: {
+        uid,
+        state,
+        type,
+        page,
+        per_page: perPage,
+        ids: ids ? ids.toString() : undefined
+      }
     })
 
     if (!res.response) {