diff --git a/tutor-contrib-harmony-plugin/setup.py b/tutor-contrib-harmony-plugin/setup.py
index 798dbf8..79474ef 100644
--- a/tutor-contrib-harmony-plugin/setup.py
+++ b/tutor-contrib-harmony-plugin/setup.py
@@ -40,7 +40,7 @@ def load_about():
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
     python_requires=">=3.7",
-    install_requires=["tutor"],
+        install_requires=["tutor>=16.0.0,<17.0.0"],
     entry_points={
         "tutor.plugin.v1": [
             "k8s_harmony = tutor_k8s_harmony_plugin.plugin",