diff --git a/.github/workflows/run-pytest.yaml b/.github/workflows/run-pytest.yaml
index 63dfedb..242db6c 100644
--- a/.github/workflows/run-pytest.yaml
+++ b/.github/workflows/run-pytest.yaml
@@ -20,6 +20,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt install libespeak-dev
+          sudo apt-get install python-dateutil
           python -m pip install --upgrade pip
           pip install flake8 pytest
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
diff --git a/docs/introduction.rst b/docs/introduction.rst
index 5e01c0d..00b315d 100644
--- a/docs/introduction.rst
+++ b/docs/introduction.rst
@@ -12,23 +12,22 @@ Installation
 
 To install the library, you can use pip: 
 
-```bash
-pip install sanatio
-```
+:code:` pip install sanatio`
 
-Usage
+Usage-Examples
 =====
 
-```python
+.. code:: python
+
 from sanatio import Validator
 val = Validator()
 
 
 # Check if the string is equal to the given value
 
-```python
+.. code:: python
+
 val.equals("abc", "abc") # True
-```