diff --git a/docs/internals/contributing/writing-code/unit-tests.txt b/docs/internals/contributing/writing-code/unit-tests.txt
index 8a126eed55..e9668793a3 100644
--- a/docs/internals/contributing/writing-code/unit-tests.txt
+++ b/docs/internals/contributing/writing-code/unit-tests.txt
@@ -271,7 +271,7 @@ If you want to run the full suite of tests, you'll need to install a number of
 dependencies:
 
 *  argon2-cffi_ 16.1.0+
-*  asgiref_ (required)
+*  asgiref_ 3.2+ (required)
 *  bcrypt_
 *  docutils_
 *  geoip2_
diff --git a/setup.py b/setup.py
index 1f6229c596..96f94b6514 100644
--- a/setup.py
+++ b/setup.py
@@ -83,7 +83,7 @@ setup(
     entry_points={'console_scripts': [
         'django-admin = django.core.management:execute_from_command_line',
     ]},
-    install_requires=['pytz', 'sqlparse >= 0.2.2', 'asgiref'],
+    install_requires=['pytz', 'sqlparse >= 0.2.2', 'asgiref ~= 3.2'],
     extras_require={
         "bcrypt": ["bcrypt"],
         "argon2": ["argon2-cffi >= 16.1.0"],
diff --git a/tests/requirements/py3.txt b/tests/requirements/py3.txt
index 3e9b48821a..fd677713f8 100644
--- a/tests/requirements/py3.txt
+++ b/tests/requirements/py3.txt
@@ -1,4 +1,4 @@
-asgiref
+asgiref ~= 3.2
 argon2-cffi >= 16.1.0
 bcrypt
 docutils