1 files changed, 4 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index d358901..68e589c 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,10 @@ c_extension = Extension(
 all_extensions = cythonize(
     [c_extension, all_extensions],
     nthreads=4,
-    compiler_directives={"embedsignature": True},
+    compiler_directives={"embedsignature": True,
+        "language_level": 2,
+        "c_string_type": "unicode",
+        "c_string_encoding": "ascii"},
 )
 
 setup(