diff --git a/conans/requirements.txt b/conans/requirements.txt
index 75df9794b05..ca3aa9d9cc0 100644
--- a/conans/requirements.txt
+++ b/conans/requirements.txt
@@ -5,7 +5,7 @@ colorama>=0.3.3, <0.5.0
 PyYAML>=3.11, <6.0
 patch-ng==1.17.1
 fasteners>=0.14.1
-six>=1.10.0
+six==1.12.0
 node-semver==0.6.1
 distro>=1.0.2, <1.2.0
 pylint>=1.9.3, <2.0; python_version < '3'