diff --git a/pyproject.toml b/pyproject.toml
index 7410f10..933adaf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ Changelog = "https://github.com/googleapis/langchain-google-cloud-sql-mssql-pyth
 
 [project.optional-dependencies]
 test = [
-    "black[jupyter]==24.8.0",
+    "black[jupyter]==26.1.0",
     "isort==5.13.2",
     "langchain==0.3.1",
     "mypy==1.11.2",