diff -r 1822d36e2c24 -r 032aad6f3586 cubicweb/__pkginfo__.py
--- a/cubicweb/__pkginfo__.py	Tue Mar 07 14:27:09 2017 +0100
+++ b/cubicweb/__pkginfo__.py	Wed Mar 22 17:14:18 2017 +0100
@@ -48,7 +48,7 @@
     'logilab-common': '>= 1.2.2',
     'logilab-mtconverter': '>= 0.8.0',
     'rql': '>= 0.34.0',
-    'yams': '>= 0.44.0',
+    'yams': '>= 0.44.0, < 0.45.0',
     #gettext                    # for xgettext, msgcat, etc...
     # web dependencies
     'lxml': '',