diff --git a/Pipfile b/Pipfile
index 844233d..135e392 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,7 +21,7 @@ pymysql = "==1.0.3"
 werkzeug = "==2.3.8"
 
 [dev-packages]
-flake8 = "==3.9.2"
+flake8 = "==5.0.4"
 yapf = "==0.40.2"
 pre-commit = "==2.13.0"
 reuse = "==0.14.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index 546af65..5acd0f4 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "836ac717649d8c57eef96586eb8960e22fbab51b87d9ede149d46958df40d7af"
+            "sha256": "a6736ceba69a01410487a93054d465f193018cd1bbf16566c0849be6f19174ea"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -586,12 +586,12 @@
         },
         "flake8": {
             "hashes": [
-                "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b",
-                "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"
+                "sha256:6fbe320aad8d6b95cec8b8e47bc933004678dc63095be98528b7bdd2a9f510db",
+                "sha256:7a1cf6b73744f5806ab95e526f6f0d8c01c66d7bbe349562d22dfca20610b248"
             ],
             "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_full_version >= '3.6.1'",
+            "version": "==5.0.4"
         },
         "identify": {
             "hashes": [
@@ -701,10 +701,11 @@
         },
         "mccabe": {
             "hashes": [
-                "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
-                "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
+                "sha256:348e0240c33b60bbdf4e523192ef919f28cb2c3d7d5c7794f74009290f236325",
+                "sha256:6c2d30ab6be0e4a46919781807b4f0d834ebdd6c6e3dca0bda5a15f863427b6e"
             ],
-            "version": "==0.6.1"
+            "markers": "python_version >= '3.6'",
+            "version": "==0.7.0"
         },
         "nodeenv": {
             "hashes": [
@@ -733,19 +734,19 @@
         },
         "pycodestyle": {
             "hashes": [
-                "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068",
-                "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"
+                "sha256:2c9607871d58c76354b697b42f5d57e1ada7d261c261efac224b664affdc5785",
+                "sha256:d1735fc58b418fd7c5f658d28d943854f8a849b01a5d0a1e6f3f3fdd0166804b"
             ],
-            "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 >= '3.6'",
+            "version": "==2.9.1"
         },
         "pyflakes": {
             "hashes": [
-                "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3",
-                "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"
+                "sha256:4579f67d887f804e67edb544428f264b7b24f435b263c4614f384135cea553d2",
+                "sha256:491feb020dca48ccc562a8c0cbe8df07ee13078df59813b83959cbdada312ea3"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.3.1"
+            "markers": "python_version >= '3.6'",
+            "version": "==2.5.0"
         },
         "python-debian": {
             "hashes": [