diff --git a/setup.py b/setup.py
index 7d14e1ce..4bd6442b 100755
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 install_requires = [
     'catkin_pkg >= 0.4.3',
     'setuptools',
-    'empy',
+    'empy < 4',
     'packaging',
     'python-dateutil',
     'PyYAML',