diff --git a/ahtcg_bot.py b/ahtcg_bot.py
index f483d89..b762b5e 100755
--- a/ahtcg_bot.py
+++ b/ahtcg_bot.py
@@ -31,12 +31,14 @@ class ArkhamDBUpdater(discord.Client):
 
     async def gather_deck_ids(self, channel: discord.TextChannel) -> dict[int, str]:
         deck_ids: dict[int, str] = {}
+        url_regex = re.compile(
+            r'(?P<prefix>.*)' + self.arkhamdb_client.origin + r'/deck/view/(?P<deck_id>\d+)')
         async for message in channel.history(limit=200, oldest_first=True):
             # ignore the bot's messages
             if message.author.id == self.user.id:
                 continue
 
-            matches = re.finditer(r'(?P<prefix>.*)' + self.arkhamdb_client.origin + r'/deck/view/(?P<deck_id>\d+)', message.content)
+            matches = url_regex.finditer(message.content)
             for match in matches:
                 deck_ids[int(match.group('deck_id'))] = match.group('prefix')