diff --git a/setup.py b/setup.py
index 349717c926..863db062eb 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@ minor_version = int(minor_version)
 
 requires = ['lxml']
 for dep in info.get('depends', []):
-    if not re.match(r'(ir|res|workflow|webdav)(\W|$)', dep):
+    if not re.match(r'(ir|res|webdav)(\W|$)', dep):
         requires.append('trytond_%s >= %s.%s, < %s.%s' %
                 (dep, major_version, minor_version, major_version,
                     minor_version + 1))