diff --git a/setup.py b/setup.py
index 29a4a0936..b05520433 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@ install_requires = [
     "distro>=1.3.0",
     "appdirs>=1.4.3",
     "treelib>=1.5.5",
-    "inflect>=2.1.0",
+    "inflect>=2.1.0,<4",
     "humanize>=0.5.1",
     "PyYAML>=5.1.2,<5.2",  # Compatibility with awscli
     "ruamel.yaml>=0.16.1",