diff --git a/bot.py b/bot.py
index b0da137..b8471ab 100644
--- a/bot.py
+++ b/bot.py
@@ -295,6 +295,24 @@ def cmd_uptime(match: Match[str]) -> Response:
     return UptimeResponse()
 
 
+@handle_message('!pep')
+def cmd_pep(match: Match[str]) -> Response:
+    *_, msg = match.groups()
+    *_, rest = msg.partition(' ')
+    pep = esc(rest.zfill(4))
+
+    if not pep.isdigit():
+        return MessageResponse(
+            match,
+            'Please make sure you gave me a number!',
+        )
+
+    return MessageResponse(
+        match,
+        f'https://www.python.org/dev/peps/pep-{pep}/',
+    )
+
+
 COMMAND_RE = re.compile(r'!\w+')
 SECRET_CMDS = frozenset(('!settoday',))