diff --git a/setup.py b/setup.py
index f283b4c47..0796c07d0 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
         "multimethod>=2.1,<3.0",
         "nlopt>=2.9.0,<3.0",
         "runtype",
-        "casadi",
+        "casadi<3.8",
         "trame",
         "trame-vtk",
         "trame-components",
diff --git a/tests/test_package_metadata.py b/tests/test_package_metadata.py
new file mode 100644
index 000000000..af9c8aaf6
--- /dev/null
+++ b/tests/test_package_metadata.py
@@ -0,0 +1,24 @@
+from contextlib import chdir
+from pathlib import Path
+from runpy import run_path
+
+import setuptools
+
+
+def test_pip_install_requires_excludes_crashing_casadi_nlopt_pair(monkeypatch):
+    root = Path(__file__).parents[1]
+    captured = {}
+
+    def fake_setup(**kwargs):
+        captured.update(kwargs)
+
+    monkeypatch.delenv("APPVEYOR", raising=False)
+    monkeypatch.delenv("CONDA_PREFIX", raising=False)
+    monkeypatch.delenv("CONDA_PY", raising=False)
+    monkeypatch.delenv("READTHEDOCS", raising=False)
+    monkeypatch.setattr(setuptools, "setup", fake_setup)
+
+    with chdir(root):
+        run_path(str(root / "setup.py"))
+
+    assert "casadi<3.8" in captured["install_requires"]