diff --git a/setup.py b/setup.py
index 80afdf86..35a6b453 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@
     install_requires=[
         'macaroonbakery>=1.1,<2.0',
         'pyRFC3339>=1.0,<2.0',
-        'pyyaml>=5.1.2,<=6.0',
+        'pyyaml>=5.1.2',
         'theblues>=0.5.1,<1.0',
         'websockets>=7.0,<8.0 ; python_version<"3.9"',
         'websockets>=8.0,<9.0 ; python_version=="3.9"',