diff --git a/.github/workflows/ci-testing.yml b/.github/workflows/ci-testing.yml
index 0ee330a..b00335c 100644
--- a/.github/workflows/ci-testing.yml
+++ b/.github/workflows/ci-testing.yml
@@ -1,7 +1,10 @@
 name: CI CPU testing
 
-# see: https://help.github.com/en/actions/reference/events-that-trigger-workflows
-on: [push, pull_request]
+on:  # https://help.github.com/en/actions/reference/events-that-trigger-workflows
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
 
 jobs:
   cpu-tests:
@@ -17,56 +20,56 @@ jobs:
     # Timeout: https://stackoverflow.com/a/59076067/4521646
     timeout-minutes: 50
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
 
-    # Note: This uses an internal pip API and may not always work
-    # https://github.com/actions/cache/blob/master/examples.md#multiple-oss-in-a-workflow
-    - name: Get pip cache
-      id: pip-cache
-      run: |
-        python -c "from pip._internal.locations import USER_CACHE_DIR; print('::set-output name=dir::' + USER_CACHE_DIR)"
+      # Note: This uses an internal pip API and may not always work
+      # https://github.com/actions/cache/blob/master/examples.md#multiple-oss-in-a-workflow
+      - name: Get pip cache
+        id: pip-cache
+        run: |
+          python -c "from pip._internal.locations import USER_CACHE_DIR; print('::set-output name=dir::' + USER_CACHE_DIR)"
 
-    - name: Cache pip
-      uses: actions/cache@v1
-      with:
-        path: ${{ steps.pip-cache.outputs.dir }}
-        key: ${{ runner.os }}-${{ matrix.python-version }}-pip-${{ hashFiles('requirements.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-${{ matrix.python-version }}-pip-
+      - name: Cache pip
+        uses: actions/cache@v1
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-${{ matrix.python-version }}-pip-${{ hashFiles('requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.python-version }}-pip-
 
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -qr requirements.txt -f https://download.pytorch.org/whl/cpu/torch_stable.html
-        pip install -q onnx
-        python --version
-        pip --version
-        pip list
-      shell: bash
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -qr requirements.txt -f https://download.pytorch.org/whl/cpu/torch_stable.html
+          pip install -q onnx
+          python --version
+          pip --version
+          pip list
+        shell: bash
 
-    - name: Download data
-      run: |
-        python -c "from utils.google_utils import * ; gdrive_download('1n_oKgR81BJtqk75b00eAjdv03qVCQn2f', 'coco128.zip')"
-        mv ./coco128 ../
+      - name: Download data
+        run: |
+          python -c "from utils.google_utils import * ; gdrive_download('1n_oKgR81BJtqk75b00eAjdv03qVCQn2f', 'coco128.zip')"
+          mv ./coco128 ../
 
-    - name: Tests workflow
-      run: |
-        export PYTHONPATH="$PWD"  # to run *.py. files in subdirectories
-        di=cpu # inference devices  # define device
-        
-        # train
-        python train.py --img 256 --batch 8 --weights weights/${{ matrix.model }}.pt --cfg models/${{ matrix.model }}.yaml --epochs 1 --device $di
-        # detect
-        python detect.py --weights weights/${{ matrix.model }}.pt --device $di
-        python detect.py --weights runs/exp0/weights/last.pt --device $di
-        # test
-        python test.py --img 256 --batch 8 --weights weights/${{ matrix.model }}.pt --device $di
-        python test.py --img 256 --batch 8 --weights runs/exp0/weights/last.pt --device $di 
-        
-        python models/yolo.py --cfg models/${{ matrix.model }}.yaml  # inspect
-        python models/export.py --img 256 --batch 1 --weights weights/${{ matrix.model }}.pt  # export
-      shell: bash
+      - name: Tests workflow
+        run: |
+          export PYTHONPATH="$PWD"  # to run *.py. files in subdirectories
+          di=cpu # inference devices  # define device
+
+          # train
+          python train.py --img 256 --batch 8 --weights weights/${{ matrix.model }}.pt --cfg models/${{ matrix.model }}.yaml --epochs 1 --device $di
+          # detect
+          python detect.py --weights weights/${{ matrix.model }}.pt --device $di
+          python detect.py --weights runs/exp0/weights/last.pt --device $di
+          # test
+          python test.py --img 256 --batch 8 --weights weights/${{ matrix.model }}.pt --device $di
+          python test.py --img 256 --batch 8 --weights runs/exp0/weights/last.pt --device $di
+
+          python models/yolo.py --cfg models/${{ matrix.model }}.yaml  # inspect
+          python models/export.py --img 256 --batch 1 --weights weights/${{ matrix.model }}.pt  # export
+        shell: bash
diff --git a/.github/workflows/greetings.yml b/.github/workflows/greetings.yml
index 9ac9dfa..d42e57b 100644
--- a/.github/workflows/greetings.yml
+++ b/.github/workflows/greetings.yml
@@ -6,30 +6,30 @@ jobs:
   greeting:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/first-interaction@v1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        pr-message: |
-          Hello @${{ github.actor }}, thank you for submitting a PR! To allow your work to be integrated as seamlessly as possible, we advise you to:
-          - Verify your PR is **up-to-date with origin/master.** If your PR is behind origin/master update by running the following, replacing 'feature' with the name of your local branch:
-          ```bash
-          git remote add upstream https://github.com/ultralytics/yolov5.git
-          git fetch upstream
-          git checkout feature  # <----- replace 'feature' with local branch name
-          git rebase upstream/master
-          git push -u origin -f
-          ```
-          - Verify all Continuous Integration (CI) **checks are passing**.
-          - Reduce changes to the absolute **minimum** required for your bug fix or feature addition. _"It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is."_  -Bruce Lee
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          pr-message: |
+            Hello @${{ github.actor }}, thank you for submitting a PR! To allow your work to be integrated as seamlessly as possible, we advise you to:
+            - Verify your PR is **up-to-date with origin/master.** If your PR is behind origin/master update by running the following, replacing 'feature' with the name of your local branch:
+            ```bash
+            git remote add upstream https://github.com/ultralytics/yolov5.git
+            git fetch upstream
+            git checkout feature  # <----- replace 'feature' with local branch name
+            git rebase upstream/master
+            git push -u origin -f
+            ```
+            - Verify all Continuous Integration (CI) **checks are passing**.
+            - Reduce changes to the absolute **minimum** required for your bug fix or feature addition. _"It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is."_  -Bruce Lee
 
-        issue-message: |
-          Hello @${{ github.actor }}, thank you for your interest in our work! Please visit our [Custom Training Tutorial](https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data) to get started, and see our [Jupyter Notebook](https://github.com/ultralytics/yolov5/blob/master/tutorial.ipynb) <a href="https://colab.research.google.com/github/ultralytics/yolov5/blob/master/tutorial.ipynb"><img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"></a>, [Docker Image](https://hub.docker.com/r/ultralytics/yolov5), and [Google Cloud Quickstart Guide](https://github.com/ultralytics/yolov5/wiki/GCP-Quickstart) for example environments.
-            
-          If this is a bug report, please provide screenshots and **minimum viable code to reproduce your issue**, otherwise we can not help you.
-            
-          If this is a custom model or data training question, please note Ultralytics does **not** provide free personal support. As a leader in vision ML and AI, we do offer professional consulting, from simple expert advice up to delivery of fully customized, end-to-end production solutions for our clients, such as:
-          - **Cloud-based AI** systems operating on **hundreds of HD video streams in realtime.**
-          - **Edge AI** integrated into custom iOS and Android apps for realtime **30 FPS video inference.**
-          - **Custom data training**, hyperparameter evolution, and model exportation to any destination.
+          issue-message: |
+            Hello @${{ github.actor }}, thank you for your interest in our work! Please visit our [Custom Training Tutorial](https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data) to get started, and see our [Jupyter Notebook](https://github.com/ultralytics/yolov5/blob/master/tutorial.ipynb) <a href="https://colab.research.google.com/github/ultralytics/yolov5/blob/master/tutorial.ipynb"><img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"></a>, [Docker Image](https://hub.docker.com/r/ultralytics/yolov5), and [Google Cloud Quickstart Guide](https://github.com/ultralytics/yolov5/wiki/GCP-Quickstart) for example environments.
 
-          For more information please visit https://www.ultralytics.com.
+            If this is a bug report, please provide screenshots and **minimum viable code to reproduce your issue**, otherwise we can not help you.
+
+            If this is a custom model or data training question, please note Ultralytics does **not** provide free personal support. As a leader in vision ML and AI, we do offer professional consulting, from simple expert advice up to delivery of fully customized, end-to-end production solutions for our clients, such as:
+            - **Cloud-based AI** systems operating on **hundreds of HD video streams in realtime.**
+            - **Edge AI** integrated into custom iOS and Android apps for realtime **30 FPS video inference.**
+            - **Custom data training**, hyperparameter evolution, and model exportation to any destination.
+
+            For more information please visit https://www.ultralytics.com.
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 4cd59c9..16b9de6 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -1,17 +1,17 @@
 name: Close stale issues
 on:
   schedule:
-  - cron: "0 0 * * *"
+    - cron: "0 0 * * *"
 
 jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@v1
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
-        stale-pr-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
-        days-before-stale: 30
-        days-before-close: 5
-        exempt-issue-label: 'documentation,tutorial'
+      - uses: actions/stale@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+          stale-pr-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.'
+          days-before-stale: 30
+          days-before-close: 5
+          exempt-issue-label: 'documentation,tutorial'