diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0b118cd..6551211 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -12,7 +12,7 @@ pytest-timeout>=2.3
 pytest-memray>=1.5; sys_platform != "win32"  # memray has no Windows wheels
 
 # ── Type checking ────────────────────────────────────────────────────────────
-mypy>=1.11
+mypy>=1.20.2
 types-requests
 
 # ── Linting / formatting ─────────────────────────────────────────────────────