diff --git a/requirements-install.txt b/requirements-install.txt
index 2174a2d..e237b1e 100644
--- a/requirements-install.txt
+++ b/requirements-install.txt
@@ -43,7 +43,7 @@ optuna>=3.1.0
 # Testing and Development
 pytest>=7.0.0
 pytest-cov>=3.0.0
-black>=22.0.0
+black>=26.5.1
 flake8>=4.0.0
 mypy>=0.950
 jupyter>=1.1.1
diff --git a/requirements.txt b/requirements.txt
index 04cffb0..fb9f5d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ onnxruntime>=1.16.0
 # Testing and Development
 pytest>=7.0.0
 pytest-cov>=3.0.0
-black>=22.0.0
+black>=26.5.1
 flake8>=4.0.0
 mypy>=0.950
 jupyter>=1.1.1