diff --git a/lower-constraints.txt b/lower-constraints.txt
index d64543d4c8..c646bb9a48 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -23,7 +23,7 @@ debtcollector==1.2.0
 decorator==4.3.0
 defusedxml==0.6.0
 dnspython==1.16.0
-doc8==0.6.0
+doc8==0.8.1
 docutils==0.14
 entrypoints==0.3
 eventlet==0.25.1
diff --git a/test-requirements.txt b/test-requirements.txt
index 7e833fbef3..dfce3b9a89 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -20,7 +20,7 @@ testtools>=2.2.0 # MIT
 psutil>=3.2.2 # BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
-doc8>=0.6.0 # Apache-2.0
+doc8>=0.8.1 # Apache-2.0
 Pygments>=2.2.0  # BSD license
 boto3>=1.9.199 # Apache-2.0