diff --git a/requirements.txt b/requirements.txt
index 77dca0ce..820557a0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ requests
 rdflib
 rdflib-jsonld
 mf2py>=1.1.0
-six>=1.12.0
+six>=1.11
 w3lib