diff --git a/packages/@jsii/python-runtime/requirements.txt b/packages/@jsii/python-runtime/requirements.txt
index d3947689cd..eb97c2a5db 100644
--- a/packages/@jsii/python-runtime/requirements.txt
+++ b/packages/@jsii/python-runtime/requirements.txt
@@ -1,4 +1,4 @@
-black~=25.11
+black~=26.5
 mypy==1.19.1
 pip~=26.1
 pytest~=9.0