diff --git a/pyproject.toml b/pyproject.toml
index b092e24..f710fbb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ classifiers = [
   "Environment :: Web Environment :: Mozilla",
   "Framework :: Django :: 4.2",
   "Framework :: Django :: 5.0",
+  "Framework :: Django :: 5.1",
   "Intended Audience :: Developers",
   "License :: OSI Approved :: BSD License",
   "Operating System :: OS Independent",
diff --git a/tox.ini b/tox.ini
index b993c17..8351f05 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,13 +3,14 @@ isolated_build = True
 envlist =
     {3.10,3.11,3.12,pypy310}-main
     {3.10,3.11,3.12,pypy310}-5.0.x
+    {3.10,3.11,3.12,pypy310}-5.1.x
     {3.8,3.9,3.10,3.11,3.12,pypy38,pypy39,pypy310}-4.2.x
     {3.8,3.9,3.10,3.11,3.12,pypy38,pypy39,pypy310}-types
 
 
 # Don't run coverage when testing with pypy:
 # see https://github.com/nedbat/coveragepy/issues/1382
-[testenv:pypy310-main,pypy310-5.0.x,{pypy38,pypy39,pypy310}-4.2.x]
+[testenv:pypy310-main,pypy310-5.1.x,pypy310-5.0.x,{pypy38,pypy39,pypy310}-4.2.x]
 commands =
     pip install --upgrade pip
     pip install -e .[tests]
@@ -45,6 +46,7 @@ deps =
     pytest
     4.2.x: Django>=4.2,<4.3
     5.0.x: Django>=5.0.1,<5.1
+    5.1.x: Django>=5.1,<5.2
     main: https://github.com/django/django/archive/main.tar.gz