diff --git a/packages/py/aitbc-sdk/pyproject.toml b/packages/py/aitbc-sdk/pyproject.toml
index 1d0f6dad..9fb4ba48 100644
--- a/packages/py/aitbc-sdk/pyproject.toml
+++ b/packages/py/aitbc-sdk/pyproject.toml
@@ -12,7 +12,8 @@ dependencies = [
     "requests>=2.31.0",
     "pydantic>=2.5.0",
     "httpx>=0.25.0",
-    "pynacl>=1.5.0"
+    "pynacl>=1.5.0",
+    "aitbc-crypto>=0.1.0"
 ]
 
 [build-system]
diff --git a/packages/py/aitbc-sdk/src/aitbc_sdk/receipts.py b/packages/py/aitbc-sdk/src/aitbc_sdk/receipts.py
index 285f2f10..10baa764 100755
--- a/packages/py/aitbc-sdk/src/aitbc_sdk/receipts.py
+++ b/packages/py/aitbc-sdk/src/aitbc_sdk/receipts.py
@@ -94,7 +94,7 @@ class CoordinatorReceiptClient:
         resp = self._request("GET", f"/v1/jobs/{job_id}/receipt", allow_404=True)
         if resp is None:
             return None
-        return resp.json()
+        return resp.json()  # type: ignore[return-value]
 
     def fetch_history(self, job_id: str) -> List[Dict[str, Any]]:
         return list(self.iter_receipts(job_id=job_id))
@@ -124,6 +124,8 @@ class CoordinatorReceiptClient:
             params["limit"] = limit
 
         response = self._request("GET", f"/v1/jobs/{job_id}/receipts", params=params)
+        if response is None:
+            raise ValueError("Response should not be None")
         payload = response.json()
 
         if isinstance(payload, list):