diff --git a/common/changes/@subsquid/openreader/better-fk-filter_2024-09-06-15-21.json b/common/changes/@subsquid/openreader/better-fk-filter_2024-09-06-15-21.json
new file mode 100644
index 000000000..8f29b61b8
--- /dev/null
+++ b/common/changes/@subsquid/openreader/better-fk-filter_2024-09-06-15-21.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@subsquid/openreader",
+      "comment": "extend thegraph fk filter with `_in` condition",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@subsquid/openreader"
+}
\ No newline at end of file
diff --git a/graphql/openreader/src/dialect/thegraph/schema.ts b/graphql/openreader/src/dialect/thegraph/schema.ts
index 481ea373f..79034ed4b 100644
--- a/graphql/openreader/src/dialect/thegraph/schema.ts
+++ b/graphql/openreader/src/dialect/thegraph/schema.ts
@@ -302,6 +302,7 @@ export class SchemaBuilder {
             case 'lookup':
                 fields[`${key}_is_null`] = {type: GraphQLBoolean}
                 fields[`${key}_`] = {type: this.getWhere(prop.type.entity)}
+                fields[`${key}_in`] = {type: new GraphQLList(new GraphQLNonNull(GraphQLString))}
                 break
             case 'list-lookup': {
                 let where = this.getWhere(prop.type.entity)