diff --git a/pyproject.toml b/pyproject.toml
index 3fe13c3..2937e4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ sqlalchemy = ">=1.4.0"
 click = ">=8.0.0"
 scipy = ">=1.7.0"
 requests = ">=2.33.0"
-quantstats = "^0.0.64"
+quantstats = ">=0.0.64,<0.0.82"
 # quantstats <0.0.66 imports IPython at module scope without declaring it, so
 # it must be declared here. Capped below 9 because IPython 9.x requires Python
 # >=3.11 and this package still supports 3.10.