diff --git a/lower-constraints.txt b/lower-constraints.txt
index 19198180b4..582eccf49a 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -19,7 +19,7 @@ cryptography==2.5
 debtcollector==1.19.0
 decorator==4.3.0
 deprecation==2.0
-doc8==0.6.0
+doc8==0.8.1
 docker-pycreds==0.2.2
 docker==3.1.1
 docutils==0.13.1
diff --git a/test-requirements.txt b/test-requirements.txt
index a181012c52..bd30321392 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,7 +19,7 @@ stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 testresources>=2.0.0 # Apache-2.0/BSD
-doc8>=0.6.0 # Apache-2.0
+doc8>=0.8.1 # Apache-2.0
 Pygments>=2.2.0 # BSD license
 # Next are used in integration tests only
 tempest>=17.1.0 # Apache-2.0