diff --git a/requirements.txt b/requirements.txt
index 74638090..3afc8109 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-filelock
-psutil
+filelock~=3.4
+psutil~=5.9
 pystache>=0.6.0
-typeguard
+typeguard~=2.12