diff --git a/Pipfile.lock b/Pipfile.lock
index 20f1525..198a934 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -76,11 +76,12 @@
         },
         "idna": {
             "hashes": [
-                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
-                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
+                "sha256:028ff3aadf0609c1fd278d8ea3089299412a7a8b9bd005dd08b9f8285bcb5cfc",
+                "sha256:82fee1fc78add43492d3a1898bfa6d8a904cc97d8427f683ed8e798d07761aa0"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.9"
+            "index": "pypi",
+            "markers": "python_version >= '3.5'",
+            "version": "==3.7"
         },
         "numpy": {
             "hashes": [