diff --git a/pyproject.toml b/pyproject.toml
index 5bff077ded..dec59a2fc4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dev = [
     "nbval<0.12",
     "filecheck==1.0.1",
     "lit<19.0.0",
-    "marimo==0.9.0",
+    "marimo==0.9.1",
     "pre-commit==4.0.0",
     "ruff==0.6.8",
     "asv<0.7",