diff --git a/Pipfile b/Pipfile
index 75978d6..ef0d957 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,7 +21,7 @@ pymysql = "==1.0.3"
 werkzeug = "==2.3.8"
 
 [dev-packages]
-flake8 = "==3.9.2"
+flake8 = "==4.0.1"
 yapf = "==0.31.0"
 pre-commit = "==2.13.0"
 reuse = "==0.14.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index b4c9624..bed49e9 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "3e2ddadb687d67eee6974c15de24ee02b77941eae9901b4939249f7e2881110e"
+            "sha256": "a3d3d29c4995b8c7e06820be59351202a12bde7cbaf2d61bc4e5559aade81b31"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -419,11 +419,11 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:0145e43d89664cfe1a2e533adc75adafed82fe2da404b4bbb6b026c0157bdb31",
-                "sha256:58da6168be89f0be59beb194da1250516fdaa062ccebd30127ac65d30045e10d"
+                "sha256:9960cd8967c8f85a56f920d5d507274e74f9ff813a0ab8889a5b5be2daf44064",
+                "sha256:c22b14cc4763c5a5b04134207736c107db42e9d3ef2d9779d465f5f1bcba572b"
             ],
             "markers": "python_version >= '3.8'",
-            "version": "==3.20.0"
+            "version": "==3.20.1"
         }
     },
     "develop": {
@@ -578,12 +578,12 @@
         },
         "flake8": {
             "hashes": [
-                "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b",
-                "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"
+                "sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d",
+                "sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d"
             ],
             "index": "pypi",
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==3.9.2"
+            "markers": "python_version >= '3.6'",
+            "version": "==4.0.1"
         },
         "identify": {
             "hashes": [
@@ -595,11 +595,11 @@
         },
         "idna": {
             "hashes": [
-                "sha256:028ff3aadf0609c1fd278d8ea3089299412a7a8b9bd005dd08b9f8285bcb5cfc",
-                "sha256:82fee1fc78add43492d3a1898bfa6d8a904cc97d8427f683ed8e798d07761aa0"
+                "sha256:050b4e5baadcd44d760cedbd2b8e639f2ff89bbc7a5730fcc662954303377aac",
+                "sha256:d838c2c0ed6fced7693d5e8ab8e734d5f8fda53a039c0164afb0b82e771e3603"
             ],
-            "markers": "python_version >= '3.5'",
-            "version": "==3.7"
+            "markers": "python_version >= '3.6'",
+            "version": "==3.8"
         },
         "jinja2": {
             "hashes": [
@@ -717,19 +717,19 @@
         },
         "pycodestyle": {
             "hashes": [
-                "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068",
-                "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"
+                "sha256:720f8b39dde8b293825e7ff02c475f3077124006db4f440dcbc9a20b76548a20",
+                "sha256:eddd5847ef438ea1c7870ca7eb78a9d47ce0cdb4851a5523949f2601d0cbbe7f"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.7.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==2.8.0"
         },
         "pyflakes": {
             "hashes": [
-                "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3",
-                "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"
+                "sha256:05a85c2872edf37a4ed30b0cce2f6093e1d0581f8c19d7393122da7e25b2b24c",
+                "sha256:3bb3a3f256f4b7968c9c788781e4ff07dce46bdf12339dcda61053375426ee2e"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.3.1"
+            "version": "==2.4.0"
         },
         "python-debian": {
             "hashes": [