diff --git a/requirements/default.txt b/requirements/default.txt
index 35fe42b34..0de34571e 100644
--- a/requirements/default.txt
+++ b/requirements/default.txt
@@ -10,7 +10,7 @@ nanotime>=0.5.2
 pyasn1>=0.4.1
 voluptuous>=0.11.7
 requests>=2.22.0
-grandalf==0.6
+grandalf>=0.6
 distro>=1.3.0
 appdirs>=1.4.3
 ruamel.yaml>=0.17.11