diff --git a/poetry.lock b/poetry.lock
index 87acfcce..54754426 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -25,11 +25,8 @@ category = "dev"
 description = "Validate configuration and produce human readable error messages."
 name = "cfgv"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.0.1"
-
-[package.dependencies]
-six = "*"
+python-versions = ">=3.6.1"
+version = "3.1.0"
 
 [[package]]
 category = "main"
@@ -401,8 +398,8 @@ asgiref = [
     {file = "aspy.yaml-1.3.0.tar.gz", hash = "sha256:e7c742382eff2caed61f87a39d13f99109088e5e93f04d76eb8d4b28aa143f45"},
 ]
 cfgv = [
-    {file = "cfgv-2.0.1-py2.py3-none-any.whl", hash = "sha256:fbd93c9ab0a523bf7daec408f3be2ed99a980e20b2d19b50fc184ca6b820d289"},
-    {file = "cfgv-2.0.1.tar.gz", hash = "sha256:edb387943b665bf9c434f717bf630fa78aecd53d5900d2e05da6ad6048553144"},
+    {file = "cfgv-3.1.0-py2.py3-none-any.whl", hash = "sha256:1ccf53320421aeeb915275a196e23b3b8ae87dea8ac6698b1638001d4a486d53"},
+    {file = "cfgv-3.1.0.tar.gz", hash = "sha256:c8e8f552ffcc6194f4e18dd4f68d9aef0c0d58ae7e7be8c82bee3c5e9edfa513"},
 ]
 click = [
     {file = "Click-7.0-py2.py3-none-any.whl", hash = "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13"},