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-rw-r--r--doc/requirements.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 597b54e..6fd065e 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -3,4 +3,5 @@
# process, which may cause wedges in the gate later.
openstackdocstheme>=1.18.1 # Apache-2.0
reno>=2.5.0 # Apache-2.0
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx>=1.6.2,!=1.6.6,<2.0.0;python_version=='2.7' # BSD
+sphinx>=1.6.2,!=1.6.6;python_version>='3.4' # BSD