diff --git a/setup/requirements_python-3.13.in b/setup/requirements_python-3.13.in
index 3e38ae0..b6566db 100644
--- a/setup/requirements_python-3.13.in
+++ b/setup/requirements_python-3.13.in
@@ -148,7 +148,7 @@ ecdsa==0.19.1
 editables==0.5
 exceptiongroup==1.2.2
 execnet==2.1.1
-filelock==3.18.0
+filelock==3.20.1
 fsspec==2025.3.2
 future==1.0.0
 glob2==0.7
diff --git a/setup/requirements_python-3.13.txt b/setup/requirements_python-3.13.txt
index a77aa15..1295fdf 100644
--- a/setup/requirements_python-3.13.txt
+++ b/setup/requirements_python-3.13.txt
@@ -229,7 +229,7 @@ fastjsonschema==2.21.1
     # via
     #   -r requirements_python-3.13.in
     #   nbformat
-filelock==3.18.0
+filelock==3.20.1
     # via
     #   -r requirements_python-3.13.in
     #   mdanalysis