diff --git a/core/pyproject.toml b/core/pyproject.toml
index 35ab728292..e574666c25 100644
--- a/core/pyproject.toml
+++ b/core/pyproject.toml
@@ -77,7 +77,9 @@ dev = [
     "setuptools-scm == 8.0.4",
     "tox == 4.14.2",
     # typing-extensions needed for TypeAlias added in Py 3.10
-    "typing-extensions == 4.9.0 ; python_version < '3.10'"
+    "typing-extensions == 4.9.0 ; python_version < '3.10'",
+    # FIXME: Freezegun 1.4.0 is incompatible with Python 3.13.0a6; use a pre-release
+    "freezegun @ git+https://github.com/spulec/freezegun#c65f4db6ef4824538061978be30954c1c739d380b ; python_version >= '3.13'",
 ]
 docs = [
     "furo == 2024.1.29",