diff --git a/03-core-features/filters/included-file.md b/03-core-features/filters/included-file.md
index e69de29b..1b6ba716 100644
--- a/03-core-features/filters/included-file.md
+++ b/03-core-features/filters/included-file.md
@@ -0,0 +1 @@
+##
\ No newline at end of file
diff --git a/README.md b/README.md
index 07ef129d..92da77eb 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ This course is made possible thanks to [namespace.so](https://namespace.so/?utm_
 - **Best Practices:** performance tuning, maintainability, and security.
 - **Capstone Project:** apply everything in a hands-on final exercise.
 
-## Development Environment Setup
+## Development Environment Setupb
 
 1. **Clone this repository (including submodules)**  
 ```bash