diff --git a/requirements-dev.txt b/requirements-dev.txt
index 98c9dec..6ec1742 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 # Development requirements for HTTP Agent integration
 
 # Code quality
-black==25.11.0
+black==26.3.0
 isort==7.0.0
 flake8==7.3.0
 mypy==1.19.0