diff --git a/manage.py b/manage.py
index 118d972..5e3f1fe 100755
--- a/manage.py
+++ b/manage.py
@@ -5,11 +5,13 @@ import sys
 
 def activate_venv(base):
     if os.path.exists(base):
-        old_os_path = os.environ.get('PATH', '')
-        os.environ['PATH'] = os.path.join(base, 'bin') + os.pathsep + old_os_path
-        site_packages = os.path.join(base, 'lib', 'python%s' % sys.version[:3], 'site-packages')
+        old_os_path = os.environ.get("PATH", "")
+        os.environ["PATH"] = os.path.join(base, "bin") + os.pathsep + old_os_path
+        version = "%s.%s" % (sys.version_info.major, sys.version_info.minor)
+        site_packages = os.path.join(base, "lib", "python%s" % version, "site-packages")
         prev_sys_path = list(sys.path)
         import site
+
         site.addsitedir(site_packages)
         sys.real_prefix = sys.prefix
         sys.prefix = base
diff --git a/requirements.txt b/requirements.txt
index 5ffb1df..b434e5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Django
+Django<4
 libsass
 django-compressor
 django-sass-processor