diff --git a/python/src/pynumbuf/adapters/numpy.cc b/python/src/pynumbuf/adapters/numpy.cc
index 3ae7170a3..32901ffad 100644
--- a/python/src/pynumbuf/adapters/numpy.cc
+++ b/python/src/pynumbuf/adapters/numpy.cc
@@ -119,7 +119,7 @@ Status SerializeArray(PyArrayObject* array, SequenceBuilder& builder,
         PyObject* result = PyObject_CallObject(numbuf_serialize_callback, arglist);
         Py_XDECREF(arglist);
         if (!result) {
-          return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/pcmoritz/numbuf/issues/10
+          return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/ray-project/numbuf/issues/10
         }
         builder.AppendDict(PyDict_Size(result));
         subdicts.push_back(result);
diff --git a/python/src/pynumbuf/adapters/python.cc b/python/src/pynumbuf/adapters/python.cc
index 23ac894ac..deafd9d44 100644
--- a/python/src/pynumbuf/adapters/python.cc
+++ b/python/src/pynumbuf/adapters/python.cc
@@ -118,7 +118,7 @@ Status append(PyObject* elem, SequenceBuilder& builder,
       PyObject* result = PyObject_CallObject(numbuf_serialize_callback, arglist);
       Py_XDECREF(arglist);
       if (!result) {
-        return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/pcmoritz/numbuf/issues/10
+        return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/ray-project/numbuf/issues/10
       }
       builder.AppendDict(PyDict_Size(result));
       subdicts.push_back(result);
@@ -259,7 +259,7 @@ Status DeserializeDict(std::shared_ptr<Array> array, int32_t start_idx, int32_t
     Py_XDECREF(result);
     result = callback_result;
     if (!callback_result) {
-      return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/pcmoritz/numbuf/issues/10
+      return Status::NotImplemented("python error"); // TODO(pcm): https://github.com/ray-project/numbuf/issues/10
     }
   }
   *out = result;