diff --git a/services/flask-backend/requirements.txt b/services/flask-backend/requirements.txt
index f9c730f..a62dd5e 100644
--- a/services/flask-backend/requirements.txt
+++ b/services/flask-backend/requirements.txt
@@ -37,6 +37,6 @@ penguintechinc-utils[flask]==0.1.0
 # Development
 pytest==8.3.4
 pytest-cov==6.0.0
-black==24.10.0
+black==26.3.1
 flake8==7.1.1
 mypy==1.14.0