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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 45d011067..ab68d4701 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -4,4 +4,5 @@
doc8>=0.6.0 # Apache-2.0
openstackdocstheme>=1.18.1 # Apache-2.0
reno>=2.5.0 # Apache-2.0
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD