diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2ffc2aa293b0..7c2255275091 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,7 +21,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip setuptools six wheel
           python -m pip install mypy pytest-cov -r requirements.txt
-      - run: mypy .
+      - run: mypy --install-types --non-interactive .
       - name: Run tests
         run: pytest --doctest-modules --ignore=project_euler/ --ignore=scripts/ --cov-report=term-missing:skip-covered --cov=. .
       - if: ${{ success() }}
diff --git a/DIRECTORY.md b/DIRECTORY.md
index e5ca6d62fe45..c872dd74e311 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -97,6 +97,7 @@
   * [Peak Signal To Noise Ratio](https://github.com/TheAlgorithms/Python/blob/master/compression/peak_signal_to_noise_ratio.py)
 
 ## Computer Vision
+  * [Cnn Classification](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/cnn_classification.py)
   * [Harris Corner](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/harris_corner.py)
   * [Mean Threshold](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/mean_threshold.py)
 
@@ -349,6 +350,7 @@
   * [Djb2](https://github.com/TheAlgorithms/Python/blob/master/hashes/djb2.py)
   * [Enigma Machine](https://github.com/TheAlgorithms/Python/blob/master/hashes/enigma_machine.py)
   * [Hamming Code](https://github.com/TheAlgorithms/Python/blob/master/hashes/hamming_code.py)
+  * [Luhn](https://github.com/TheAlgorithms/Python/blob/master/hashes/luhn.py)
   * [Md5](https://github.com/TheAlgorithms/Python/blob/master/hashes/md5.py)
   * [Sdbm](https://github.com/TheAlgorithms/Python/blob/master/hashes/sdbm.py)
   * [Sha1](https://github.com/TheAlgorithms/Python/blob/master/hashes/sha1.py)