Merge pull request #960 from robindebois/pin-nbconvert-version

Pin nbconvert version to fix #958

Author: minrk

nbviewer/index.py

@@ -50,5 +50,5 @@ def index_notebook(self, notebook_url, notebook_contents, public=False):
             )
         else:
             app_log.info(
-                "Indexing old notebook={}, public={}".format(notebook_url, public, resp)
+                "Indexing old notebook={}, public={}".format(notebook_url, public)
             )

requirements.txt

@@ -3,7 +3,7 @@ ipython
 jupyter_client
 jupyter_server>=0.2.0
 markdown>=3.0,==3.1.1 # pin until we workaround #909, which is a regression in 3.2
-nbconvert>=5.4
+nbconvert>=5.4,<6.0.0 # pin to fix #958
 nbformat>=4.2
 newrelic!=2.80.0.60
 pycurl