diff --git a/noxfile.py b/noxfile.py
index d5389b50..956201a6 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -28,6 +28,7 @@ def coverage(*args):
 
     # Once coverage 5 is used then `.coverage` can move into `pyproject.toml`.
     session.install("coverage<5.0.0", "pretend", "pytest>=6.2.0", "pip>=9.0.2")
+    session.install(".")
 
     if "pypy" not in session.python:
         coverage(
diff --git a/setup.py b/setup.py
index 419aa284..c6a1caec 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,7 @@
     author=about["__author__"],
     author_email=about["__email__"],
     python_requires=">=3.6",
-    install_requires=["pyparsing>=2.0.2"],  # Needed to avoid issue #91
+    install_requires=["pyparsing>=2.0.2,<3"],  # Needed to avoid issue #91
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",