diff --git a/Pipfile.lock b/Pipfile.lock
index 718e842..0798132 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -5,14 +5,14 @@
         },
         "host-environment-markers": {
             "implementation_name": "cpython",
-            "implementation_version": "3.6.3",
+            "implementation_version": "3.6.4",
             "os_name": "posix",
             "platform_machine": "x86_64",
             "platform_python_implementation": "CPython",
             "platform_release": "4.13.0-36-generic",
             "platform_system": "Linux",
             "platform_version": "#40-Ubuntu SMP Fri Feb 16 20:07:48 UTC 2018",
-            "python_full_version": "3.6.3",
+            "python_full_version": "3.6.4",
             "python_version": "3.6",
             "sys_platform": "linux"
         },