diff --git a/updatechecker/updatechecker.py b/updatechecker/updatechecker.py
index 1182383..b35a14a 100644
--- a/updatechecker/updatechecker.py
+++ b/updatechecker/updatechecker.py
@@ -365,7 +365,7 @@ class UpdateChecker(commands.Cog):
         """Add repos to the whitelist"""
         data = await self.conf.whitelist()
         ds = set(data)
-        ns = set([r.name for r in repos])
+        ns = {r.name for r in repos}
         ss = ds | ns
         await self.conf.whitelist.set(list(ss))
         await ctx.send(f"Whitelist update successful: {humanize_list(tuple(map(inline, ss)))}")
@@ -375,7 +375,7 @@ class UpdateChecker(commands.Cog):
         """Remove repos from the whitelist"""
         data = await self.conf.whitelist()
         ds = set(data)
-        ns = set([r.name for r in repos])
+        ns = {r.name for r in repos}
         ss = ds - ns
         await self.conf.whitelist.set(list(ss))
         await ctx.send(
@@ -397,7 +397,7 @@ class UpdateChecker(commands.Cog):
         """Add repos to the blacklist"""
         data = await self.conf.blacklist()
         ds = set(data)
-        ns = set([r.name for r in repos])
+        ns = {r.name for r in repos}
         ss = ds | ns
         await self.conf.blacklist.set(list(ss))
         await ctx.send(f"Backlist update successful: {humanize_list(tuple(map(inline, ss)))}")
@@ -407,7 +407,7 @@ class UpdateChecker(commands.Cog):
         """Remove repos from the blacklist"""
         data = await self.conf.blacklist()
         ds = set(data)
-        ns = set([r.name for r in repos])
+        ns = {r.name for r in repos}
         ss = ds - ns
         await self.conf.blacklist.set(list(ss))
         await ctx.send(