diff --git a/pyproject.toml b/pyproject.toml
index f67af13c21..0dc4832b91 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,7 +76,7 @@ dev = [
   "pre-commit >=2.9",
   "pybtex",
   "pylint",
-  "pytest <8.0", # Pinned due to breakage with xdoctest. See: https://github.com/Erotemic/xdoctest/issues/151
+  "pytest <9.0", # Pinned due to breakage with xdoctest. See: https://github.com/Erotemic/xdoctest/issues/151
   "pytest-cov",
   "pytest-socket",
   "pytest-xdist[psutil] >=3.2",