diff --git a/doc/requirements.txt b/doc/requirements.txt
index 597b54ed..d959d443 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -3,4 +3,4 @@
 # 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!=1.6.6,!=1.6.7,>=1.6.2 # BSD
diff --git a/requirements.txt b/requirements.txt
index 6ff7bec0..07e30c52 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-horizon>=13.0.0  # Apache-2.0
+horizon>=13.0.0 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
 openstacksdk>=0.11.2 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0