diff --git a/pyproject.toml b/pyproject.toml
index d7e5c84..ebeb430 100755
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,8 @@ dependencies = ["numpy>=1.24",
                 "matplotlib",
                 "astropy>=5.3",
                 "celerite>=0.4.2",
-                "scipy>=1.10"]
+                "scipy>=1.10",
+                "joblib"]
 
 classifiers = [
     "Development Status :: 5 - Production/Stable",