diff --git a/lower-constraints.txt b/lower-constraints.txt
index 9094b209f..12a13f272 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -2,7 +2,7 @@ alembic==0.9.6
 cachetools==2.0.0
 coverage==4.0
 croniter==0.3.4
-doc8==0.6.0
+doc8==0.8.1
 dogpile.cache==0.6.2
 eventlet==0.26.0
 fixtures==3.0.0
diff --git a/test-requirements.txt b/test-requirements.txt
index bf68cc286..1287f971a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,7 @@
 hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
-doc8>=0.6.0 # Apache-2.0
+doc8>=0.8.1 # Apache-2.0
 Pygments>=2.2.0 # BSD license
 fixtures>=3.0.0 # Apache-2.0/BSD
 nose>=1.3.7 # LGPL