diff --git a/pyproject.toml b/pyproject.toml
index 734df7e..f5b4a39 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ Changelog = "https://github.com/googleapis/langchain-google-bigtable-python/blob
 
 [project.optional-dependencies]
 test = [
-    "black[jupyter]==25.1.0",
+    "black[jupyter]==26.1.0",
     "isort==6.0.1",
     "mypy==1.17.0",
     "pytest-asyncio==1.1.0",