diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 633b87e..7c771a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,4 +33,4 @@ jobs:
       - name: Run formatter
         run: uv run ruff format --check
       - name: Run type checker
-        run: uv run mypy .
\ No newline at end of file
+        run: uv run ty check
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9ab50f8..75400a9 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,18 +8,12 @@ repos:
       # Run the formatter
       - id: ruff-format
 
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.16.1
+  - repo: local
     hooks:
-      - id: mypy
-        additional_dependencies: [
-          pydantic>=2.7.0,
-          pydantic-settings>=2.8.1,
-          types-passlib,
-          types-requests,
-          requests>=2.31.0,
-          httpx>=0.28.1,
-        ]
+      - id: ty
+        name: ty check
+        entry: ty check .
+        language: system
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.6.0
diff --git a/app/utils/requests_extensions.py b/app/utils/requests_extensions.py
index 5c1c0fd..593e9a2 100644
--- a/app/utils/requests_extensions.py
+++ b/app/utils/requests_extensions.py
@@ -1,4 +1,5 @@
 from requests import PreparedRequest
+from requests.structures import CaseInsensitiveDict
 from requests.auth import AuthBase
 
 
@@ -7,5 +8,6 @@ def __init__(self, token):
         self.token = token
 
     def __call__(self, r: PreparedRequest):
+        r.headers = r.headers or CaseInsensitiveDict()
         r.headers["Authorization"] = "Bearer " + self.token
         return r
diff --git a/pyproject.toml b/pyproject.toml
index 471de06..8261324 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,6 @@ dev = [
     "pytest-cov>=6.2.1",
 ]
 lint = [
-    "mypy>=1.16.1",
     "pre-commit>=4.2.0",
     "ruff>=0.12.1",
     "ty>=0.0.1a12",
diff --git a/uv.lock b/uv.lock
index 6fa2439..48ffef3 100644
--- a/uv.lock
+++ b/uv.lock
@@ -397,7 +397,6 @@ dev = [
     { name = "pytest-cov" },
 ]
 lint = [
-    { name = "mypy" },
     { name = "pre-commit" },
     { name = "ruff" },
     { name = "ty" },
@@ -423,7 +422,6 @@ dev = [
     { name = "pytest-cov", specifier = ">=6.2.1" },
 ]
 lint = [
-    { name = "mypy", specifier = ">=1.16.1" },
     { name = "pre-commit", specifier = ">=4.2.0" },
     { name = "ruff", specifier = ">=0.12.1" },
     { name = "ty", specifier = ">=0.0.1a12" },
@@ -438,35 +436,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b3/38/89ba8ad64ae25be8de66a6d463314cf1eb366222074cfda9ee839c56a4b4/mdurl-0.1.2-py3-none-any.whl", hash = "sha256:84008a41e51615a49fc9966191ff91509e3c40b939176e643fd50a5c2196b8f8", size = 9979, upload-time = "2022-08-14T12:40:09.779Z" },
 ]
 
-[[package]]
-name = "mypy"
-version = "1.16.1"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "mypy-extensions" },
-    { name = "pathspec" },
-    { name = "typing-extensions" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/81/69/92c7fa98112e4d9eb075a239caa4ef4649ad7d441545ccffbd5e34607cbb/mypy-1.16.1.tar.gz", hash = "sha256:6bd00a0a2094841c5e47e7374bb42b83d64c527a502e3334e1173a0c24437bab", size = 3324747, upload-time = "2025-06-16T16:51:35.145Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/28/e3/96964af4a75a949e67df4b95318fe2b7427ac8189bbc3ef28f92a1c5bc56/mypy-1.16.1-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:ddc91eb318c8751c69ddb200a5937f1232ee8efb4e64e9f4bc475a33719de438", size = 11063480, upload-time = "2025-06-16T16:47:56.205Z" },
-    { url = "https://files.pythonhosted.org/packages/f5/4d/cd1a42b8e5be278fab7010fb289d9307a63e07153f0ae1510a3d7b703193/mypy-1.16.1-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:87ff2c13d58bdc4bbe7dc0dedfe622c0f04e2cb2a492269f3b418df2de05c536", size = 10090538, upload-time = "2025-06-16T16:46:43.92Z" },
-    { url = "https://files.pythonhosted.org/packages/c9/4f/c3c6b4b66374b5f68bab07c8cabd63a049ff69796b844bc759a0ca99bb2a/mypy-1.16.1-cp313-cp313-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:0a7cfb0fe29fe5a9841b7c8ee6dffb52382c45acdf68f032145b75620acfbd6f", size = 11836839, upload-time = "2025-06-16T16:36:28.039Z" },
-    { url = "https://files.pythonhosted.org/packages/b4/7e/81ca3b074021ad9775e5cb97ebe0089c0f13684b066a750b7dc208438403/mypy-1.16.1-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:051e1677689c9d9578b9c7f4d206d763f9bbd95723cd1416fad50db49d52f359", size = 12715634, upload-time = "2025-06-16T16:50:34.441Z" },
-    { url = "https://files.pythonhosted.org/packages/e9/95/bdd40c8be346fa4c70edb4081d727a54d0a05382d84966869738cfa8a497/mypy-1.16.1-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:d5d2309511cc56c021b4b4e462907c2b12f669b2dbeb68300110ec27723971be", size = 12895584, upload-time = "2025-06-16T16:34:54.857Z" },
-    { url = "https://files.pythonhosted.org/packages/5a/fd/d486a0827a1c597b3b48b1bdef47228a6e9ee8102ab8c28f944cb83b65dc/mypy-1.16.1-cp313-cp313-win_amd64.whl", hash = "sha256:4f58ac32771341e38a853c5d0ec0dfe27e18e27da9cdb8bbc882d2249c71a3ee", size = 9573886, upload-time = "2025-06-16T16:36:43.589Z" },
-    { url = "https://files.pythonhosted.org/packages/cf/d3/53e684e78e07c1a2bf7105715e5edd09ce951fc3f47cf9ed095ec1b7a037/mypy-1.16.1-py3-none-any.whl", hash = "sha256:5fc2ac4027d0ef28d6ba69a0343737a23c4d1b83672bf38d1fe237bdc0643b37", size = 2265923, upload-time = "2025-06-16T16:48:02.366Z" },
-]
-
-[[package]]
-name = "mypy-extensions"
-version = "1.1.0"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/a2/6e/371856a3fb9d31ca8dac321cda606860fa4548858c0cc45d9d1d4ca2628b/mypy_extensions-1.1.0.tar.gz", hash = "sha256:52e68efc3284861e772bbcd66823fde5ae21fd2fdb51c62a211403730b916558", size = 6343, upload-time = "2025-04-22T14:54:24.164Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/79/7b/2c79738432f5c924bef5071f933bcc9efd0473bac3b4aa584a6f7c1c8df8/mypy_extensions-1.1.0-py3-none-any.whl", hash = "sha256:1be4cccdb0f2482337c4743e60421de3a356cd97508abadd57d47403e94f5505", size = 4963, upload-time = "2025-04-22T14:54:22.983Z" },
-]
-
 [[package]]
 name = "nodeenv"
 version = "1.9.1"
@@ -506,15 +475,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/3b/a4/ab6b7589382ca3df236e03faa71deac88cae040af60c071a78d254a62172/passlib-1.7.4-py2.py3-none-any.whl", hash = "sha256:aa6bca462b8d8bda89c70b382f0c298a20b5560af6cbfa2dce410c0a2fb669f1", size = 525554, upload-time = "2020-10-08T19:00:49.856Z" },
 ]
 
-[[package]]
-name = "pathspec"
-version = "0.12.1"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/ca/bc/f35b8446f4531a7cb215605d100cd88b7ac6f44ab3fc94870c120ab3adbf/pathspec-0.12.1.tar.gz", hash = "sha256:a482d51503a1ab33b1c67a6c3813a26953dbdc71c31dacaef9a838c4e29f5712", size = 51043, upload-time = "2023-12-10T22:30:45Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/cc/20/ff623b09d963f88bfde16306a54e12ee5ea43e9b597108672ff3a408aad6/pathspec-0.12.1-py3-none-any.whl", hash = "sha256:a0d503e138a4c123b27490a4f7beda6a01c6f288df0e4a8b79c7eb0dc7b4cc08", size = 31191, upload-time = "2023-12-10T22:30:43.14Z" },
-]
-
 [[package]]
 name = "platformdirs"
 version = "4.3.8"