diff --git a/disco/bot/parser.py b/disco/bot/parser.py
index 16ee3f2..722abe6 100644
--- a/disco/bot/parser.py
+++ b/disco/bot/parser.py
@@ -2,7 +2,6 @@ import re
 import six
 import copy
 
-
 # Regex which splits out argument parts
 PARTS_RE = re.compile('(\<|\[|\{)((?:\w+|\:|\||\.\.\.| (?:[0-9]+))+)(?:\>|\]|\})')
 
@@ -16,6 +15,12 @@ TYPE_MAP = {
     'snowflake': lambda ctx, data: int(data),
 }
 
+try:
+    import dateparser
+    TYPE_MAP['duration'] = lambda ctx, data: dateparser.parse(data, settings={'TIMEZONE': 'UTC'})
+except ImportError:
+    pass
+
 
 def to_bool(ctx, data):
     if data in BOOL_OPTS:
diff --git a/disco/types/guild.py b/disco/types/guild.py
index b478cd9..f93a88f 100644
--- a/disco/types/guild.py
+++ b/disco/types/guild.py
@@ -207,7 +207,7 @@ class GuildMember(SlottedModel):
         self.client.api.guilds_members_roles_add(self.guild.id, self.user.id, to_snowflake(role))
 
     def remove_role(self, role):
-        self.clients.api.guilds_members_roles_remove(self.guild.id, self.user.id, to_snowflake(role))
+        self.client.api.guilds_members_roles_remove(self.guild.id, self.user.id, to_snowflake(role))
 
     @cached_property
     def owner(self):