diff --git a/pyproject.toml b/pyproject.toml
index c3f33d7..f891749 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ Changelog = "https://github.com/googleapis/llama-index-cloud-sql-pg-python/blob/
 
 [project.optional-dependencies]
 test = [
-    "black[jupyter]==25.12.0",
+    "black[jupyter]==26.1.0",
     "isort==7.0.0",
     "mypy==1.19.1",
     "pytest-asyncio==1.3.0",