diff --git a/setup.py b/setup.py
index 9f2e1619..08ea2417 100755
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def get_version():
 
 EXTRAS_REQUIRE = {
     "css": [
-        "tinycss2>=1.1.0,<1.3",
+        "tinycss2>=1.1.0,<1.5",
     ],
 }