diff --git a/Pipfile b/Pipfile
index 2fb9396..57b5d2b 100644
--- a/Pipfile
+++ b/Pipfile
@@ -14,4 +14,4 @@ netaddr = "*"
 [dev-packages]
 
 [requires]
-python_version = "3.6"
+python_version = "3.7"
diff --git a/Pipfile.lock b/Pipfile.lock
index 259672f..b081388 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "e342e70ef2ad162d6b0b63776039c57b057f612a5e4f086182ec5f0d80757217"
+            "sha256": "b37b2eef18c05e50da0de8e00dfe1e988859a2ba98d024aa7c3761154adb7288"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.6"
+            "python_version": "3.7"
         },
         "sources": [
             {
@@ -18,10 +18,10 @@
     "default": {
         "ansible": {
             "hashes": [
-                "sha256:747e4cca09c10833ffe3a7c53af310d2d387bd4f499ec6e1bde60662606aaff8"
+                "sha256:1027f627e6d8a2d51f3a79abb01447716a78aa646e0c2f9860cfde273256a28c"
             ],
             "index": "pypi",
-            "version": "==2.6.2"
+            "version": "==2.6.3"
         },
         "asn1crypto": {
             "hashes": [
@@ -108,28 +108,28 @@
         },
         "cryptography": {
             "hashes": [
-                "sha256:21af753934f2f6d1a10fe8f4c0a64315af209ef6adeaee63ca349797d747d687",
-                "sha256:27bb401a20a838d6d0ea380f08c6ead3ccd8c9d8a0232dc9adcc0e4994576a66",
-                "sha256:29720c4253263cff9aea64585adbbe85013ba647f6e98367efff9db2d7193ded",
-                "sha256:2a35b7570d8f247889784010aac8b384fd2e4a47b33e15c4a60b45a7c1944120",
-                "sha256:42c531a6a354407f42ee07fda5c2c0dc822cf6d52744949c182f2b295fbd4183",
-                "sha256:5eb86f03f9c4f0ac2336ac5431271072ddf7ecc76b338e26366732cfac58aa19",
-                "sha256:67f7f57eae8dede577f3f7775957f5bec93edd6bdb6ce597bb5b28e1bdf3d4fb",
-                "sha256:6ec84edcbc966ae460560a51a90046503ff0b5b66157a9efc61515c68059f6c8",
-                "sha256:7ba834564daef87557e7fcd35c3c3183a4147b0b3a57314e53317360b9b201b3",
-                "sha256:7d7f084cbe1fdb82be5a0545062b59b1ad3637bc5a48612ac2eb428ff31b31ea",
-                "sha256:82409f5150e529d699e5c33fa8fd85e965104db03bc564f5f4b6a9199e591f7c",
-                "sha256:87d092a7c2a44e5f7414ab02fb4145723ebba411425e1a99773531dd4c0e9b8d",
-                "sha256:8c56ef989342e42b9fcaba7c74b446f0cc9bed546dd00034fa7ad66fc00307ef",
-                "sha256:9449f5d4d7c516a6118fa9210c4a00f34384cb1d2028672100ee0c6cce49d7f6",
-                "sha256:bc2301170986ad82d9349a91eb8884e0e191209c45f5541b16aa7c0cfb135978",
-                "sha256:c132bab45d4bd0fff1d3fe294d92b0a6eb8404e93337b3127bdec9f21de117e6",
-                "sha256:c3d945b7b577f07a477700f618f46cbc287af3a9222cd73035c6ef527ef2c363",
-                "sha256:cee18beb4c807b5c0b178f4fa2fae03cef9d51821a358c6890f8b23465b7e5d2",
-                "sha256:d01dfc5c2b3495184f683574e03c70022674ca9a7be88589c5aba130d835ea90"
+                "sha256:02602e1672b62e803e08617ec286041cc453e8d43f093a5f4162095506bc0beb",
+                "sha256:10b48e848e1edb93c1d3b797c83c72b4c387ab0eb4330aaa26da8049a6cbede0",
+                "sha256:17db09db9d7c5de130023657be42689d1a5f60502a14f6f745f6f65a6b8195c0",
+                "sha256:227da3a896df1106b1a69b1e319dce218fa04395e8cc78be7e31ca94c21254bc",
+                "sha256:2cbaa03ac677db6c821dac3f4cdfd1461a32d0615847eedbb0df54bb7802e1f7",
+                "sha256:31db8febfc768e4b4bd826750a70c79c99ea423f4697d1dab764eb9f9f849519",
+                "sha256:4a510d268e55e2e067715d728e4ca6cd26a8e9f1f3d174faf88e6f2cb6b6c395",
+                "sha256:6a88d9004310a198c474d8a822ee96a6dd6c01efe66facdf17cb692512ae5bc0",
+                "sha256:76936ec70a9b72eb8c58314c38c55a0336a2b36de0c7ee8fb874a4547cadbd39",
+                "sha256:7e3b4aecc4040928efa8a7cdaf074e868af32c58ffc9bb77e7bf2c1a16783286",
+                "sha256:8168bcb08403ef144ff1fb880d416f49e2728101d02aaadfe9645883222c0aa5",
+                "sha256:8229ceb79a1792823d87779959184a1bf95768e9248c93ae9f97c7a2f60376a1",
+                "sha256:8a19e9f2fe69f6a44a5c156968d9fc8df56d09798d0c6a34ccc373bb186cee86",
+                "sha256:8d10113ca826a4c29d5b85b2c4e045ffa8bad74fb525ee0eceb1d38d4c70dfd6",
+                "sha256:be495b8ec5a939a7605274b6e59fbc35e76f5ad814ae010eb679529671c9e119",
+                "sha256:dc2d3f3b1548f4d11786616cf0f4415e25b0fbecb8a1d2cd8c07568f13fdde38",
+                "sha256:e4aecdd9d5a3d06c337894c9a6e2961898d3f64fe54ca920a72234a3de0f9cb3",
+                "sha256:e79ab4485b99eacb2166f3212218dd858258f374855e1568f728462b0e6ee0d9",
+                "sha256:f995d3667301e1754c57b04e0bae6f0fa9d710697a9f8d6712e8cca02550910f"
             ],
             "index": "pypi",
-            "version": "==2.3"
+            "version": "==2.3.1"
         },
         "idna": {
             "hashes": [