diff --git a/setup.py b/setup.py
index 76792f17..63030bd4 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ def load_about():
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
     python_requires=">=3.7",
-    install_requires=["tutor", "packaging"],
+    install_requires=["tutor>=15.0.0,<16.0.0"],
     entry_points={
         "tutor.plugin.v1": [
             "drydock = drydock.plugin",