diff --git a/cookbook.yaml b/cookbook.yaml
index 8e3cd60..6f697c2 100644
--- a/cookbook.yaml
+++ b/cookbook.yaml
@@ -1,6 +1,6 @@
 $globals:
   shell: bash
-  version: "7.0"
+  version: "8.1"
   vars:
     p_sync: --sync
 
@@ -26,7 +26,7 @@ lint:
     - install
   commands:
     - black --check .
-    - p check
+    - p check --lockfile
     - ruff check .
     - mypy .
 
diff --git a/pyproject.toml b/pyproject.toml
index 31b7cb7..03ee0bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-    "phosphorus>=0.3",
+    "phosphorus>=0.5",
 ]
 build-backend = "phosphorus.construction.api"
 
@@ -23,6 +23,8 @@ keywords = [
 classifiers = [
     "Development Status :: 4 - Beta",
     "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3 :: Only",
+    "License :: OSI Approved :: BSD License",
     "Intended Audience :: Developers",
 ]
 
@@ -40,25 +42,25 @@ documentation = "https://tvdb-api-client.readthedocs.io/en/stable/"
 
 [tool.phosphorus.dev-dependencies]
 dev = [
-    "ipdb~=0.13; python_version>='3.10'",
-    "ipython~=8.21; python_version>='3.10'",
+    "ipdb~=0.13",
+    "ipython~=8.18",
 ]
 lint = [
-    "black~=24.1",
-    "mypy~=1.8",
-    "ruff~=0.5",
+    "black~=24.10",
+    "mypy~=1.12",
+    "ruff~=0.7",
     "types-requests~=2.0",
 ]
 test = [
-    "pytest~=8.0",
+    "pytest~=8.3",
     "pytest-cov~=5.0",
 ]
 docs = [
     "mkdocs~=1.6",
     "mkdocs-material~=9.5",
     "mkdocs-material-extensions~=1.3",
-    "Pygments~=2.17",
-    "pymdown-extensions~=10.8",
+    "pygments~=2.18",
+    "pymdown-extensions~=10.11",
 ]
 
 [tool.black]
@@ -122,11 +124,10 @@ select = [
     "PGH",
     "PERF",
     "PIE",
-    "PLC",
-    "PLE",
-    "PLW",
+    "PL",
     "PT",
     "PTH",
+    "PYI",
     "Q",
     "RET",
     "RSE",
@@ -151,6 +152,7 @@ ignore = [
     "COM812",
     "E501",
     "FIX002",
+    "PLR09",
     "TD002",
     "TD003",
     "TRY003",
@@ -159,6 +161,7 @@ ignore = [
 [tool.ruff.lint.per-file-ignores]
 "tests/**" = [
     "FBT001",
+    "PLR2004",
     "PT011",
     "S101",
 ]
@@ -178,16 +181,20 @@ forced-separate = [
 split-on-trailing-comma = false
 
 [tool.pytest.ini_options]
-addopts = "-vv"
+addopts = "-ra -v --cov"
 testpaths = "tests"
 
 [tool.coverage.run]
+branch = true
 source = [
     "src/",
 ]
 data_file = ".cov_cache/coverage.dat"
 
 [tool.coverage.report]
+exclude_also = [
+    "if TYPE_CHECKING:",
+]
 show_missing = true
 skip_covered = true
 skip_empty = true
diff --git a/src/tvdb_api_client/client.py b/src/tvdb_api_client/client.py
index 5006d93..68b47b5 100644
--- a/src/tvdb_api_client/client.py
+++ b/src/tvdb_api_client/client.py
@@ -2,6 +2,7 @@
 
 import json
 from base64 import urlsafe_b64decode
+from http import HTTPStatus
 from typing import Any, Protocol, cast
 
 import requests
@@ -55,11 +56,11 @@ def _generate_token(self) -> str:
             data=json.dumps(self._auth_data),
             timeout=(60, 120),
         )
-        if response.status_code == 401:
+        if response.status_code == HTTPStatus.UNAUTHORIZED:
             msg = "Invalid credentials."
             raise ConnectionRefusedError(msg)
 
-        if response.status_code != 200:
+        if response.status_code != HTTPStatus.OK:
             msg = "Unexpected Response."
             raise ConnectionError(msg)
 
@@ -75,14 +76,14 @@ def _get(self, url: URL) -> dict[str, Any]:
         headers = {"accept": "application/json", "Authorization": f"Bearer {token}"}
         response = requests.get(url.string, headers=headers, timeout=(60, 120))
 
-        if response.status_code == 200:
+        if response.status_code == HTTPStatus.OK:
             return cast(dict[str, Any], response.json())
 
-        if response.status_code in {400, 404}:
+        if response.status_code in {HTTPStatus.BAD_REQUEST, HTTPStatus.NOT_FOUND}:
             msg = "There are no data for this term."
             raise LookupError(msg)
 
-        if response.status_code == 401:
+        if response.status_code == HTTPStatus.UNAUTHORIZED:
             msg = "Invalid credentials."
             raise ConnectionRefusedError(msg)