diff --git a/setup.py b/setup.py
index 1ea8341..214df0d 100755
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@ setup(
     package_dir={"twisted": "daphne/twisted"},
     packages=find_packages() + ["twisted.plugins"],
     include_package_data=True,
-    install_requires=["twisted[tls]>=18.7", "autobahn>=0.18", "asgiref>=3.2.10,<4"],
+    install_requires=["twisted[tls]>=19.7", "autobahn>=0.18", "asgiref>=3.2.10,<4"],
     python_requires=">=3.6",
     setup_requires=["pytest-runner"],
     extras_require={"tests": ["hypothesis", "pytest", "pytest-asyncio"]},
diff --git a/tox.ini b/tox.ini
index 3bba274..da7d4d9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{36,37,38,39,310}-twisted{187,latest}
+    py{36,37,38,39,310}-twisted{197,latest}
 
 [testenv]
 usedevelop = true
@@ -8,5 +8,5 @@ extras = tests
 commands =
     pytest -v {posargs}
 deps =
-    twisted187: twisted==18.7.0
+    twisted187: twisted==19.7.0
     twistedlatest: twisted>=20.3.0