diff --git a/requirements-dev.txt b/requirements-dev.txt
index e7784e6..d463656 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,7 +8,7 @@ pytest-asyncio>=1.4.0
 # Code quality
 black>=26.5.1
 flake8>=7.3.0
-mypy>=2.3.0
+mypy>=2.3.1
 pre-commit>=4.6.2
 
 # Security floors for transitive development dependencies