diff --git a/python-urllib3.changes b/python-urllib3.changes
index 8a3df5e..cb5a7fb 100644
--- a/python-urllib3.changes
+++ b/python-urllib3.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Oct 15 10:53:45 UTC 2019 - Ralf Haferkamp <rhafer@suse.de>
+
+- Require a new enough release of python-six. 1.25.6 needs at least
+  1.12.0 for ensure_text() and friends.
+
 -------------------------------------------------------------------
 Wed Oct  2 13:18:36 UTC 2019 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/python-urllib3.spec b/python-urllib3.spec
index 5760d03..ed31d7e 100644
--- a/python-urllib3.spec
+++ b/python-urllib3.spec
@@ -47,7 +47,7 @@ Requires:       python-certifi
 Requires:       python-cryptography >= 1.3.4
 Requires:       python-idna >= 2.0.0
 Requires:       python-pyOpenSSL
-Requires:       python-six
+Requires:       python-six >= 1.12.0
 BuildArch:      noarch
 # for SSL module on older distros
 %if 0%{?suse_version} < 1500
@@ -69,7 +69,7 @@ BuildRequires:  %{python_module idna >= 2.0.0}
 BuildRequires:  %{python_module mock >= 1.3.0}
 BuildRequires:  %{python_module psutil}
 BuildRequires:  %{python_module pytest}
-BuildRequires:  %{python_module six}
+BuildRequires:  %{python_module six >= 1.12.0}
 BuildRequires:  %{python_module tornado < 6}
 BuildRequires:  %{python_module urllib3 >= %{version}}
 %endif