diff --git a/requirements-docs.txt b/requirements-docs.txt
index 894defcb..e936c197 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -50,7 +50,7 @@ jinja2==2.10
 jmespath==0.9.4
 josepy==1.1.0
 jsonlines==1.2.0
-kombu==4.4.0
+kombu==4.3.0
 lockfile==0.12.2
 mako==1.0.7
 markupsafe==1.1.1
diff --git a/requirements.in b/requirements.in
index b085f5c7..e3d0c66b 100644
--- a/requirements.in
+++ b/requirements.in
@@ -26,6 +26,7 @@ future
 gunicorn
 inflection
 jinja2
+kombu==4.3.0 # kombu 4.4.0 requires redis 3
 lockfile
 marshmallow-sqlalchemy
 marshmallow
diff --git a/requirements.txt b/requirements.txt
index cf2be225..2aa5f157 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ jinja2==2.10
 jmespath==0.9.4           # via boto3, botocore
 josepy==1.1.0             # via acme
 jsonlines==1.2.0          # via cloudflare
-kombu==4.4.0              # via celery
+kombu==4.3.0
 lockfile==0.12.2
 mako==1.0.7               # via alembic
 markupsafe==1.1.1         # via jinja2, mako