diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 07662d3..6c5360b 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -14,8 +14,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.11.6
 
       - name: Build docs requirements
         run: pip install -r docs/requirements.txt
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 2926897..0a305ba 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,6 @@
-pallets_sphinx_themes==2.*
-myst-parser==2.0.*
-autodoc_pydantic==2.0.*
+sphinx==7.2.6
+pallets_sphinx_themes==2.1.1
+myst-parser==2.0.0
+autodoc_pydantic==2.0.1
+pydantic==2.4.2
+pydantic-settings==2.0.3
diff --git a/src/python3_anticaptcha/FunCaptchaTaskProxyless.py b/src/python3_anticaptcha/FunCaptchaTaskProxyless.py
index 3f384ec..722d1db 100644
--- a/src/python3_anticaptcha/FunCaptchaTaskProxyless.py
+++ b/src/python3_anticaptcha/FunCaptchaTaskProxyless.py
@@ -4,7 +4,7 @@
 import aiohttp
 import requests
 
-from python3_anticaptcha.core.config import APP_KEY, create_task_url, get_sync_result, get_async_result
+from python3_anticaptcha.core.config import create_task_url, get_sync_result, get_async_result
 
 
 class FunCaptchaTaskProxyless:
diff --git a/src/python3_anticaptcha/core/serializer.py b/src/python3_anticaptcha/core/serializer.py
index ad190e0..ac1f1e9 100644
--- a/src/python3_anticaptcha/core/serializer.py
+++ b/src/python3_anticaptcha/core/serializer.py
@@ -1,4 +1,4 @@
-from typing import Dict
+from typing import Dict, Literal
 
 from pydantic import Field, BaseModel, constr
 
@@ -26,7 +26,7 @@ class CreateTaskRequestSer(BaseAPIRequestSer):
     task: Dict = Field(None, description="Task object.")
     languagePool: str = Field("en", description="Sets workers' pool language. Only applies to image captchas.")
     callbackUrl: str = Field(None, description="Web address where we can send the results of captcha task processing.")
-    softId: int = Field(APP_KEY, const=True)
+    softId: Literal[APP_KEY] = APP_KEY
 
 
 class CreateTaskRequestTaskSer(MyBaseModel):
diff --git a/src/requirements.txt b/src/requirements.txt
index 232cfd6..c85a781 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -1,4 +1,4 @@
 requests>=2.21.0
-aiohttp==3.*
+aiohttp>=3.7.4
 tenacity==8.*
-pydantic==1.*
+pydantic>=2.4.0