diff --git a/pyproject.toml b/pyproject.toml
index b6926a2f5f6..ca5358e25fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,6 +51,7 @@ dependencies=[
   "expecttest",
   "flatbuffers",
   "hypothesis",
+  "mpmath==1.3.0",
   "numpy>=1.25.2",
   "packaging",
   "pandas",