diff --git a/requirements-dev.txt b/requirements-dev.txt
index 221263d..ee7db6b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 # Development requirements for HTTP Agent integration
 
 # Code quality
-black==26.3.1
+black==26.5.1
 isort==8.0.1
 flake8==7.3.0
 mypy==1.20.2