diff --git a/setup.py b/setup.py
index 2ef498f..e8e4173 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
         "pyscard",
         "serial",
         "pytlv",
-        "cmd2 >= 1.3.0",
+        "cmd2 >= 1.3.0, < 2.0.0",
         "jsonpath-ng",
         "construct >= 2.9",
         "bidict",