diff --git a/Pipfile.lock b/Pipfile.lock
index b3c0525..77f74df 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -224,11 +224,10 @@
         },
         "six": {
             "hashes": [
-                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
-                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "index": "pypi",
-            "version": "==1.13.0"
+            "version": "==1.16.0"
         },
         "wcwidth": {
             "hashes": [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 39f24f0..8b34f43 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,7 +6,7 @@ pyflakes==2.1.1
 #deps pytest
 py==1.8.0
 more-itertools==8.0.2
-six==1.13.0
+six==1.16.0
 attrs==19.3.0
 pluggy==0.13.1
 pytest==5.3.2