diff --git a/Tools/requirements-dev.txt b/Tools/requirements-dev.txt
index 0beaab2..6e0772d 100644
--- a/Tools/requirements-dev.txt
+++ b/Tools/requirements-dev.txt
@@ -1,6 +1,6 @@
 # Requirements file for external linters and checks we run on
 # Tools/clinic, Tools/cases_generator/, and Tools/peg_generator/ in CI
-mypy==1.16.1
+mypy==1.19.1
 
 # needed for peg_generator:
 types-psutil==7.0.0.20250601