diff --git a/frontend/management/commands/fake_data.py b/frontend/management/commands/fake_data.py
index 7bd3610..ccdeb04 100644
--- a/frontend/management/commands/fake_data.py
+++ b/frontend/management/commands/fake_data.py
@@ -1,4 +1,5 @@
 import random
+import markdown.treeprocessors
 
 from django.core.management.base import BaseCommand
 from django.db.transaction import atomic
@@ -82,13 +83,22 @@ def handle(self, fake_complex_challenges, fake_simple_challenges,
         )
 
         for i in range(1, fake_complex_challenges + 1):
-            if random.choice((False, False, True)):
+            choice = random.choice((1, 2, 2, 3))
+            if choice == 1:
                 detail = """<p>众所周知，对 $x$ 求导得到的结果为 1。<code>flag{FLAG_INDEX}</code></p>
                 <p>块状公式测试 <code>flag{FLAG_INDEX:USER_ID}</code></p>
                 <p>$$\\frac{1}{3} = \\frac{2}{6}$$</p>
                 """
-            else:
+            elif choice == 2:
                 detail = '<code>flag{FLAG_INDEX}</code> 或 <code>flag{FLAG_INDEX:USER_ID}</code>'
+            elif choice == 3:
+                # test markdown code block
+                detail = markdown.markdown(
+                    """```python
+def a():
+    pass
+```""", extensions=['codehilite', 'fenced_code'],
+                )
             Challenge.create(
                 Context(root),
                 name=f'复杂题 {i}',
diff --git a/requirements-lock.txt b/requirements-lock.txt
index 36e81f2..6d99a52 100644
--- a/requirements-lock.txt
+++ b/requirements-lock.txt
@@ -10,7 +10,6 @@ django-allauth==0.57.0
 gevent==23.9.1
 greenlet==3.0.0
 idna==3.4
-importlib-metadata==6.8.0
 jmespath==0.10.0
 Markdown==3.4.4
 oauthlib==3.2.2
@@ -19,6 +18,7 @@ psycopg-binary==3.1.12
 psycopg-pool==3.1.8
 pycparser==2.21
 pycryptodome==3.19.0
+Pygments==2.16.1
 PyJWT==2.8.0
 pymemcache==4.0.0
 pyOpenSSL==23.2.0
@@ -27,9 +27,8 @@ PyYAML==6.0.1
 requests==2.31.0
 requests-oauthlib==1.3.1
 sqlparse==0.4.4
-typing-extensions==4.8.0
+typing_extensions==4.8.0
 urllib3==2.0.6
 uWSGI==2.0.22
-zipp==3.17.0
 zope.event==5.0
 zope.interface==6.1
diff --git a/requirements.txt b/requirements.txt
index c4c2132..c48f272 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,7 @@ psycopg==3.1.12
 psycopg-binary==3.1.12
 psycopg-pool==3.1.8
 pycryptodome==3.19.0
+pygments==2.16.1
 pymemcache==4.0.0
 pyOpenSSL==23.2.0
 PyYAML==6.0.1