diff --git a/synapse/handlers/acme.py b/synapse/handlers/acme.py
index cfb5a4f39..c52796983 100644
--- a/synapse/handlers/acme.py
+++ b/synapse/handlers/acme.py
@@ -77,13 +77,12 @@ class AcmeHandler(object):
             yield self._issuer._ensure_registered()
         except Exception:
             raise ConfigError("Failed to register with the ACME provider. This is likely"
-                              " happening because the install is new, and ACME v1 has"
-                              " been deprecated by Let's Encrypt and is disabled for"
-                              " installs set up after November 2019. At the moment,"
-                              " Synapse doesn't support ACME v2. For more info and"
-                              " alternative solution, check out"
-                              " https://github.com/matrix-org/synapse/blob/master/docs/"
-                              "ACME.md#deprecation-of-acme-v1")
+                " happening because the install is new, and ACME v1 has been deprecated"
+                " by Let's Encrypt and is disabled for installs set up after November"
+                " 2019. At the moment, Synapse doesn't support ACME v2. For more info"
+                " and alternative solution, check out https://github.com/matrix-org"
+                "/synapse/blob/master/docs/ACME.md#deprecation-of-acme-v1"
+            )
 
     @defer.inlineCallbacks
     def provision_certificate(self):