diff --git a/setup.py b/setup.py
index 875ab04d1..064cb1261 100644
--- a/setup.py
+++ b/setup.py
@@ -75,7 +75,7 @@ install_requires = [
     "networkx>=2.1,<2.5",
     "pydot>=1.2.4",
     "speedcopy>=2.0.1; python_version < '3.8' and sys_platform == 'win32'",
-    "flatten_json>=0.1.6",
+    "flatten_json>=0.1.6,<0.1.8",
     "tabulate>=0.8.7",
     "pygtrie==2.3.2",
     "dpath>=2.0.1,<3",