diff --git a/packages/core/src/QueryBuilder.ts b/packages/core/src/QueryBuilder.ts
index 546365e3..94d3547c 100644
--- a/packages/core/src/QueryBuilder.ts
+++ b/packages/core/src/QueryBuilder.ts
@@ -228,7 +228,15 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "fetch-constant", pallet, constant },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        { instruction: "fetch-constant"; pallet: TPallet; constant: TConstant },
+      ],
+      TDescriptor
+    >;
   }
 
   readStorage<
@@ -241,7 +249,20 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "read-storage", pallet, storage, args },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        {
+          instruction: "read-storage";
+          pallet: TPallet;
+          storage: TStorage;
+          args: TArguments;
+        },
+      ],
+      TDescriptor
+    >;
   }
 
   readStorages<
@@ -254,7 +275,21 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "read-storage", pallet, storage, args, multi: true },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        {
+          instruction: "read-storage";
+          pallet: TPallet;
+          storage: TStorage;
+          args: TArguments;
+          multi: true;
+        },
+      ],
+      TDescriptor
+    >;
   }
 
   readStorageEntries<
@@ -269,7 +304,20 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "read-storage-entries", pallet, storage, args },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        {
+          instruction: "read-storage-entries";
+          pallet: TPallet;
+          storage: TStorage;
+          args: TArguments;
+        },
+      ],
+      TDescriptor
+    >;
   }
 
   callApi<
@@ -282,7 +330,20 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "call-api", pallet, api, args },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        {
+          instruction: "call-api";
+          pallet: TPallet;
+          api: TApi;
+          args: TArguments;
+        },
+      ],
+      TDescriptor
+    >;
   }
 
   callApis<
@@ -295,6 +356,20 @@ export default class Query<
     return new Query([
       ...this.#instructions,
       { instruction: "call-api", pallet, api, args, multi: true },
-    ]);
+      // TODO: remove manual type hint once all TypeScript environments
+      // i.e. StackBlitz can infer this correctly
+    ]) as Query<
+      [
+        ...TInstructions,
+        {
+          instruction: "call-api";
+          pallet: TPallet;
+          api: TApi;
+          args: TArguments;
+          multi: true;
+        },
+      ],
+      TDescriptor
+    >;
   }
 }