diff --git a/README.md b/README.md
index 94efe63..5612781 100644
--- a/README.md
+++ b/README.md
@@ -65,14 +65,14 @@ node lib/index.js
 
 ## Synapse Antispam Module
 
-Using the bot to manage your rooms is great, however if you want to use your ban lists 
+Using the bot to manage your rooms is great, however if you want to use your ban lists
 (or someone else's) on your server to affect all of your users then an antispam module
 is needed. Primarily meant to block invites from undesired homeservers/users, Mjolnir's
 antispam module is a way to interpret ban lists and apply them to your entire homeserver.
 
 First, install the module to your Synapse python environment:
 ```
-pip install -e git+https://github.com/matrix-org/mjolnir.git#egg=mjolnir&subdirectory=synapse_antispam
+pip install -e "git+https://github.com/matrix-org/mjolnir.git#egg=mjolnir&subdirectory=synapse_antispam"
 ```
 
 *Note*: Where your python environment is depends on your installation method. Visit
diff --git a/synapse_antispam/mjolnir/ban_list.py b/synapse_antispam/mjolnir/ban_list.py
index e85b391..57b7ad0 100644
--- a/synapse_antispam/mjolnir/ban_list.py
+++ b/synapse_antispam/mjolnir/ban_list.py
@@ -29,7 +29,7 @@ class BanList(object):
         self.room_rules = []
         self.build()
 
-    def build(with_event=None):
+    def build(self, with_event=None):
         @defer.inlineCallbacks
         def run(with_event):
             events = yield self.get_relevant_state_events()