diff --git a/ci/travis.sh b/ci/travis.sh
index ea3cb62..bbc7791 100755
--- a/ci/travis.sh
+++ b/ci/travis.sh
@@ -53,7 +53,7 @@ if [ "$USE_PYPY_RELEASE_VERSION" != "" ]; then
     source testenv/bin/activate
 fi
 
-pip install -U pip setuptools wheel
+pip install -U pip setuptools wheel pep517
 
 if [ "$CHECK_FORMATTING" = "1" ]; then
     pip install yapf==${YAPF_VERSION}
@@ -77,8 +77,8 @@ EOF
     exit 0
 fi
 
-python setup.py sdist --formats=zip
-pip install dist/*.zip
+python -m pep517.build --source --out-dir dist/ .
+pip install dist/*.tar.gz
 
 if [ "$CHECK_DOCS" = "1" ]; then
     pip install -Ur ci/rtd-requirements.txt
diff --git a/pyproject.toml b/pyproject.toml
index 7443971..07b11e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,3 +4,10 @@ filename = "docs/source/history.rst"
 directory = "newsfragments"
 underlines = ["-", "~", "^"]
 issue_format = "`#{issue} <https://github.com/python-trio/trimeter/issues/{issue}>`__"
+
+[build-system]
+requires = [
+    "setuptools >= 50.0.3",
+    "wheel >= 0.35.1",
+]
+build-backend = "setuptools.build_meta"