diff --git a/requirements.txt b/requirements.txt
index 9d1598673..be7ff7ff6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
-psutil~=5.9
+filelock~=3.4
+psutil >=5.9, <=6.0
 pystache>=0.6.0
 typeguard>=3.0.1
 typing-compat