diff --git a/pyproject.toml b/pyproject.toml
index e11ba6a..281d3e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 build-backend = "scikit_build_core.build"
 requires = [
     "scikit-build-core >=0.9.3",
-    "nanobind >=2.7",
+    "nanobind >=2.15",
     "pcpp",
 
     # stubgen uses @override :/
diff --git a/stubgen/stubgen.py b/stubgen/stubgen.py
index 442afff..60fb0db 100644
--- a/stubgen/stubgen.py
+++ b/stubgen/stubgen.py
@@ -1,6 +1,5 @@
 import argparse
 import importlib
-import os
 import sys
 from collections.abc import Callable
 from pathlib import Path
@@ -27,7 +26,7 @@ def put_function(self,
         if (name and fn_module
                 and fn_module != self.module.__name__
                 and parent is not None):
-            self.import_object(fn_module, name=None)
+            self.bind(fn_module, name=None)
             rhs = f"{fn_module}.{fn.__qualname__}"
             if type(fn) is staticmethod:
                 rhs = f"staticmethod({rhs})"
@@ -61,7 +60,6 @@ def main():
 
     sys.path.extend(cast("list[str]", args.python_path or []))
 
-    os.environ["ISLPY_NO_DOWNCAST_DEPRECATION"] = "1"
     mod = importlib.import_module(cast("str", args.module))
     for fname in cast("list[str]", args.exec or []):
         execdict = {"__name__": "islpy._monkeypatch"}