diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 073a7d5..24ef962 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -7,7 +7,7 @@
 Changelog
 =========
 
-0.9.1 (unreleased)
+0.9.1 (2024-10-01)
 ------------------
 
 **Bug fix**
diff --git a/xfails.txt b/xfails.txt
index 451c6f5..69431ee 100644
--- a/xfails.txt
+++ b/xfails.txt
@@ -166,3 +166,4 @@ array_api_tests/test_special_cases.py::test_unary[acos(x_i < -1) -> NaN]
 array_api_tests/test_special_cases.py::test_unary[sqrt(x_i < 0) -> NaN]
 array_api_tests/test_special_cases.py::test_unary[asin(x_i < -1) -> NaN]
 array_api_tests/test_special_cases.py::test_unary[atanh(x_i > 1) -> NaN]
+array_api_tests/test_special_cases.py::test_unary[atanh(x_i < -1) -> NaN]