diff --git a/setup.py b/setup.py
index b3e2ba9..fc67e82 100755
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@ deps = [
     'idna==2.10',
     'PyYAML>=5.1',
     'cachetools',
-    'rfc3986>=2.0.0',
+    'rfc3986>=1.5.0',
 ]
 try:
     import concurrent.futures