diff --git a/.circleci/config.yml b/.circleci/config.yml
index a01741de..fe5ae248 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,6 +1,6 @@
 version: 2.1
 orbs:
-  codecov: codecov/codecov@3
+  codecov: codecov/codecov@4
 
 jobs:
   build:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1798a944..15abf468 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,28 +3,40 @@ on: [push, pull_request]
 jobs:
   run:
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
       - name: Set up Python 3.10
         uses: actions/setup-python@v4
         with:
           python-version: '3.10'
       - name: Install dependencies
         run: pip install -r requirements.txt
-      - name: Run ATS
-        uses: codecov/codecov-ats@v0
-        env:
-          CODECOV_STATIC_TOKEN: ${{ secrets.CODECOV_STATIC_TOKEN }}
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
       - name: Run tests and collect coverage
-        run: pytest --cov app ${{ env.CODECOV_ATS_TESTS }}
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        run: pytest --cov app
+      - name: Upload coverage to Codecov (arg token)
+        uses: codecov/codecov-action@main
+        with:
+          fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }}
+          verbose: true
+      - name: Upload coverage to Codecov (env token)
+        uses: codecov/codecov-action@main
         with:
-          flags: smart-tests
+          fail_ci_if_error: true
           verbose: true
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      - name: Upload coverage to Codecov (no token)
+        uses: codecov/codecov-action@main
+        with:
+          fail_ci_if_error: true
+          verbose: true
+      - name: Upload coverage to Codecov (oidc)
+        uses: codecov/codecov-action@main
+        with:
+          fail_ci_if_error: true
+          use_oidc: true
+          verbose: true
diff --git a/app/calculator.py b/app/calculator.py
index 8a976b25..4f380e8e 100644
--- a/app/calculator.py
+++ b/app/calculator.py
@@ -13,3 +13,4 @@ def divide(x, y):
         if y == 0:
             return 'Cannot divide by 0'
         return x * 1.0 / y
+
diff --git a/bitrise.yml b/bitrise.yml
new file mode 100644
index 00000000..a09c296d
--- /dev/null
+++ b/bitrise.yml
@@ -0,0 +1,34 @@
+format_version: "13"
+default_step_lib_source: https://github.com/bitrise-io/bitrise-steplib.git
+project_type: other
+workflows:
+  primary:
+    steps:
+    - activate-ssh-key@4:
+        run_if: '{{getenv "SSH_RSA_PRIVATE_KEY" | ne ""}}'
+    - git-clone@8: {}
+    - script@1:
+        inputs:
+        - script_file_path: null
+        - content: |
+            #!/usr/bin/env bash
+            set -e
+            set -o pipefail
+            set -x # debug log
+
+            pip3 install -r requirements.txt
+            pytest --cov app
+    - codecov@3:
+        inputs:
+        - OS: macos
+        - CODECOV_TOKEN: $CODECOV_TOKEN
+    - deploy-to-bitrise-io@2: {}
+meta:
+  bitrise.io:
+    stack: osx-xcode-14.3.x-ventura
+    machine_type_id: g2-m1.4core
+trigger_map:
+- push_branch: main
+  workflow: primary
+- pull_request_source_branch: '*'
+  workflow: primary
diff --git a/requirements.txt b/requirements.txt
index 1f157f03..f1e325af 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,10 @@
-attrs==23.2.0
-coverage==7.5.2
-iniconfig==2.0.0
-packaging==24.0
+attrs==25.3.0
+coverage==7.8.0
+iniconfig==2.1.0
+packaging==24.2
 pluggy==1.5.0
 py==1.11.0
-pyparsing==3.1.2
-pytest==8.2.1
-pytest-cov==5.0.0
-tomli==2.0.1
+pyparsing==3.2.3
+pytest==8.3.5
+pytest-cov==6.1.0
+tomli==2.2.1