diff --git a/rdflib_jsonld/serializer.py b/rdflib_jsonld/serializer.py
index 36d9d03..6815ffd 100644
--- a/rdflib_jsonld/serializer.py
+++ b/rdflib_jsonld/serializer.py
@@ -10,6 +10,7 @@
     >>> register('json-ld', Serializer, 'rdflib_jsonld.serializer', 'JsonLDSerializer')
 
     >>> from rdflib import Graph
+    >>> from rdflib import __version__ as rdflib_version
 
     >>> testrdf = '''
     ... @prefix dcterms: <http://purl.org/dc/terms/> .
@@ -19,7 +20,12 @@
 
     >>> g = Graph().parse(data=testrdf, format='n3')
 
-    >>> print(g.serialize(format='json-ld', indent=4).decode())
+    >>> g_display = g.serialize(format='json-ld', indent=4)
+    >>> if rdflib_version < "6.0.0":
+    ...     # rdflib < 6.0.0 returns bytes when no
+    ...     # destination is provided.
+    ...     g_display = g_display.decode()
+    >>> print(g_display)
     [
         {
             "@id": "http://example.org/about",
diff --git a/setup.py b/setup.py
index 1ac76e6..bd5e09f 100644
--- a/setup.py
+++ b/setup.py
@@ -77,7 +77,6 @@ def md2pypi(filename):
     url="https://github.com/RDFLib/rdflib-jsonld",
     license="BSD",
     packages=["rdflib_jsonld"],
-    use_2to3=True,
     zip_safe=False,
     platforms=["any"],
     classifiers=[
@@ -93,7 +92,7 @@ def md2pypi(filename):
         "Natural Language :: English",
     ],
     test_suite="nose.collector",
-    install_requires=["rdflib>=5.0.0"],
+    install_requires=["rdflib"],
     tests_require=["nose"],
     command_options={
         "build_sphinx": {
diff --git a/test/runner.py b/test/runner.py
index 4d2452d..5cd51b1 100644
--- a/test/runner.py
+++ b/test/runner.py
@@ -1,5 +1,6 @@
 from __future__ import with_statement
 import json
+import rdflib
 from rdflib import ConjunctiveGraph
 from rdflib.compare import isomorphic
 from rdflib_jsonld._compat import IS_PY3
@@ -9,14 +10,25 @@
 
 
 # monkey-patch NTriplesParser to keep source bnode id:s ..
-from rdflib.plugins.parsers.ntriples import NTriplesParser, r_nodeid, bNode
-
-
-def _preserving_nodeid(self):
-    if not self.peek("_"):
-        return False
-    return bNode(self.eat(r_nodeid).group(1))
-
+from rdflib.plugins.parsers.ntriples import r_nodeid, bNode
+# NTriplesParser was renamed between 5.0.0 and 6.0.0.
+if rdflib.__version__ < "6":
+    from rdflib.plugins.parsers.ntriples import NTriplesParser
+else:
+    from rdflib.plugins.parsers.ntriples import W3CNTriplesParser as NTriplesParser
+
+
+# NTriplesParser.nodeid changed its function signature between 5.0.0 and 6.0.0.
+if rdflib.__version__ < "6":
+    def _preserving_nodeid(self):
+        if not self.peek("_"):
+            return False
+        return bNode(self.eat(r_nodeid).group(1))
+else:
+    def _preserving_nodeid(self, bnode_context=None):
+        if not self.peek("_"):
+            return False
+        return bNode(self.eat(r_nodeid).group(1))
 
 NTriplesParser.nodeid = _preserving_nodeid
 # .. and accept bnodes everywhere
diff --git a/test/test_compaction.py b/test/test_compaction.py
index 6a77dae..e34b312 100644
--- a/test/test_compaction.py
+++ b/test/test_compaction.py
@@ -233,7 +233,9 @@ def case(*args):
 
 def run(data, expected):
     g = Graph().parse(data=data, format="turtle")
-    result = g.serialize(format="json-ld", context=expected["@context"]).decode("utf-8")
+    result = g.serialize(format="json-ld", context=expected["@context"])
+    if isinstance(result, bytes):
+        result = result.decode("utf-8")
     result = json.loads(result)
 
     sort_graph(result)