diff --git a/pyproject.toml b/pyproject.toml
index ffc0c47..cde2b0b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 test = [
-    "black==24.8.0",
+    "black==25.12.0",
     "coverage",
     "build",
     "twine",
diff --git a/requirements.txt b/requirements.txt
index a499f67..4e28e95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ python-dateutil>=2.6.0
 zeep>=4.0.0
 
 # Tests & Linting
-black==24.8.0
+black==25.12.0
 coverage
 
 # Packaging