diff --git a/pyproject.toml b/pyproject.toml
index eca47ed..b815343 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dependencies = [
     "wget",
     "astropy",
     "numpy",
-    "gwemopt==0.2.2",
+    "gwemopt==0.3.1",
     "pandas",
     "pydantic>=2.2.0",
     "planobs",