diff --git a/src/lib/shopify.ts b/src/lib/shopify.ts
index 9bc0a98..9649385 100644
--- a/src/lib/shopify.ts
+++ b/src/lib/shopify.ts
@@ -43,6 +43,21 @@ export interface ShopifyProduct {
         };
       }>;
     };
+    sellingPlanGroups?: {
+      edges: Array<{
+        node: {
+          name: string;
+          sellingPlans: {
+            edges: Array<{
+              node: {
+                id: string;
+                name: string;
+              };
+            }>;
+          };
+        };
+      }>;
+    };
     options: Array<{
       name: string;
       values: string[];