diff --git a/requirements/pinned.txt b/requirements/pinned.txt
index f03025142b..eca3e8328b 100644
--- a/requirements/pinned.txt
+++ b/requirements/pinned.txt
@@ -10,7 +10,7 @@ cryptography==48.0.0
     # via securesystemslib
 pycparser==3.0
     # via cffi
-securesystemslib==1.3.1
+securesystemslib==1.4.0
     # via -r requirements/main.txt
 urllib3==2.7.0
     # via -r requirements/main.txt