diff --git a/requirements.pip b/requirements.pip
index 748c4f4..417553a 100644
--- a/requirements.pip
+++ b/requirements.pip
@@ -1,5 +1,5 @@
 M2Crypto>=0.20.2
-rdflib>=3.2.0 #-RC
+rdflib>=3.2.0,<=3.4.0
 rdfextras
 requests
 html5lib
diff --git a/setup.py b/setup.py
index 4c17ee0..4c2a507 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
     author_email='bennomadic at gmail dot com',
     download_url='https://github.com/bennomadic/python-webid.git',
     #url=...
-    install_requires=['M2Crypto>=0.20.2', 'rdflib>=3.2.0', 'rdfextras',
+    install_requires=['M2Crypto>=0.20.2', 'rdflib>=3.2.0,<=3.4.0', 'rdfextras',
         'requests', 'html5lib'],
     #test_requires=[],
     platforms=['any'],