diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
new file mode 100644
index 0000000..5639973
--- /dev/null
+++ b/.github/workflows/pythonapp.yml
@@ -0,0 +1,30 @@
+name: Python application
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.7
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Lint with flake8
+      run: |
+        pip install flake8
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Test with pytest
+      run: |
+        pip install pytest
+        pytest
diff --git a/First_edition_2014/requirements.txt b/First_edition_2014/requirements.txt
index 7d93487..69a3f35 100644
--- a/First_edition_2014/requirements.txt
+++ b/First_edition_2014/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.10.1
+Flask==1.0
 SQLAlchemy==0.9.7
 bpython==0.13.1
 coverage==3.7.1
@@ -8,6 +8,6 @@ ipython==0.13.2
 matplotlib==1.3.1
 nose==1.3.0
 numpy==1.8.2
-scapy==2.2.0
+scapy==2.4.1
 scikit-learn==0.14.1
 scipy==0.12.1
\ No newline at end of file
diff --git a/README.md b/README.md
index ee23985..59665cc 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,14 @@
-## Python & Algorithms Book 
+## Book on Python, Algorithms, and Data Structures
 
 
-➡️ [PDF (1st edition, 2014, published by Hanbit Media)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014/ebook_pdf/book_second_edition.pdf) and [source code](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014).
+➡️ [PDF (1st edition, 2013, published by Hanbit Media in 2015)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014/ebook_pdf/book_second_edition.pdf) and [source code](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/First_edition_2014).
 
 
-➡️ [Source code (2nd edition, 2019)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/Second_edition_2019).
+➡️ [Source code (2nd edition, 2019, ported to Python 3.7)](https://github.com/bt3gl/Python-and-Algorithms-and-Data-Structures/blob/master/Second_edition_2019).
 
 
 
 ## License
 
 This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/).
-When making a reference to my work, please use my [website](http://bt3gl.github.io/index.html).
+
diff --git a/requirements.txt b/requirements.txt
index 7d93487..69a3f35 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Flask==0.10.1
+Flask==1.0
 SQLAlchemy==0.9.7
 bpython==0.13.1
 coverage==3.7.1
@@ -8,6 +8,6 @@ ipython==0.13.2
 matplotlib==1.3.1
 nose==1.3.0
 numpy==1.8.2
-scapy==2.2.0
+scapy==2.4.1
 scikit-learn==0.14.1
 scipy==0.12.1
\ No newline at end of file