diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py
index 94d7784ae..fa2419937 100644
--- a/synapse/python_dependencies.py
+++ b/synapse/python_dependencies.py
@@ -33,7 +33,7 @@ REQUIREMENTS = {
     "ujson": ["ujson"],
     "blist": ["blist"],
     "pysaml2": ["saml2"],
-    "pymacaroons": ["pymacaroons"],
+    "pymacaroons-pynacl": ["pymacaroons"],
 }
 CONDITIONAL_REQUIREMENTS = {
     "web_client": {