diff --git a/pyinstaller/requirements.txt b/pyinstaller/requirements.txt
index 1e12d2dd3..f69d0ce3d 100644
--- a/pyinstaller/requirements.txt
+++ b/pyinstaller/requirements.txt
@@ -7,6 +7,7 @@
 pyinstaller==6.11.1
 pyinstaller-hooks-contrib>=2024.0
 setuptools>=78.1.1
+backports.tarfile==1.2.0
 
 # Platform helpers
 altgraph>=0.17