diff --git a/Tools/requirements-dev.txt b/Tools/requirements-dev.txt
index af5cbaa7689f33..00565358247bd7 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==1.19.1
+mypy==1.20.0
 
 # needed for peg_generator:
 types-psutil==7.2.2.20260130