diff --git a/Pipfile.lock b/Pipfile.lock
index f568532..0187826 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -157,11 +157,10 @@
         },
         "pyflakes": {
             "hashes": [
-                "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92",
-                "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"
+                "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3",
+                "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.2.0"
+            "version": "==2.3.1"
         },
         "pyparsing": {
             "hashes": [