diff --git a/requirements.txt b/requirements.txt
index a6913d8..264899e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,4 +22,4 @@ lxml>=6.1.0
 urllib3>=2.7.0
 # Transitive of urllib3/requests; PYSEC-2026-215 for idna < 3.15.
 idna>=3.15
-pyinstaller>=6.20.0
+pyinstaller>=6.21.0