diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9925fed..f480521 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -21,7 +21,7 @@ repos:
       - id: trailing-whitespace
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.6
+    rev: v0.15.15
     hooks:
       - id: ruff-check
         args: ["--fix", "--exit-non-zero-on-fix"]
@@ -34,6 +34,6 @@ repos:
         args: ["--py311-plus"]
 
   - repo: https://github.com/rhysd/actionlint
-    rev: v1.7.11
+    rev: v1.7.12
     hooks:
       - id: actionlint
diff --git a/main.py b/main.py
index 5d53885..534ac2b 100644
--- a/main.py
+++ b/main.py
@@ -92,7 +92,7 @@ openai_settings: OpenAIResponsesModelSettings = OpenAIResponsesModelSettings(
     openai_text_verbosity="low",
 )
 chatgpt_agent: Agent[BotDependencies, str] = Agent(
-    model="openai:gpt-5-chat-latest",
+    model="deepseek:deepseek-v4-flash",
     deps_type=BotDependencies,
     model_settings=openai_settings,
 )
@@ -1113,7 +1113,7 @@ def enhance_image1(image: bytes) -> bytes:
     """
     # Read the image
     nparr: ImageType = np.frombuffer(image, np.uint8)
-    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
+    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)  # pyright: ignore[reportAssignmentType]
 
     # Denoise the image with conservative settings
     img_np = cv2.fastNlMeansDenoisingColored(img_np, None, 5, 5, 7, 21)
@@ -1150,7 +1150,7 @@ def enhance_image2(image: bytes) -> bytes:
     """
     # Read the image
     nparr: ImageType = np.frombuffer(image, np.uint8)
-    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
+    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)  # pyright: ignore[reportAssignmentType]
 
     # Denoise the image with conservative settings
     img_np = cv2.fastNlMeansDenoisingColored(img_np, None, 5, 5, 7, 21)
@@ -1194,7 +1194,7 @@ def enhance_image3(image: bytes) -> bytes:
     """
     # Read the image
     nparr: ImageType = np.frombuffer(image, np.uint8)
-    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
+    img_np: ImageType = cv2.imdecode(nparr, cv2.IMREAD_COLOR)  # pyright: ignore[reportAssignmentType]
 
     # Denoise the image with conservative settings
     img_np = cv2.fastNlMeansDenoisingColored(img_np, None, 5, 5, 7, 21)