diff --git a/Pipfile.lock b/Pipfile.lock
index b3c0525..dc3afa8 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -193,12 +193,8 @@
             "version": "==2.5.0"
         },
         "pyflakes": {
-            "hashes": [
-                "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0",
-                "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"
-            ],
-            "index": "pypi",
-            "version": "==2.1.1"
+            "hashes": [],
+            "version": "==3.4.0"
         },
         "pyparsing": {
             "hashes": [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 39f24f0..f1a30e9 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 flake8==3.7.9
 mccabe==0.6.1
 pycodestyle==2.5.0
-pyflakes==2.1.1
+pyflakes==3.4.0
 
 #deps pytest
 py==1.8.0