diff --git a/Chapter 13/Exercise 13.1 b/Chapter 13/Exercise_13.1.js similarity index 100% rename from Chapter 13/Exercise 13.1 rename to Chapter 13/Exercise_13.1.js diff --git a/Chapter 13/Exercise 13.2 b/Chapter 13/Exercise_13.2.js similarity index 100% rename from Chapter 13/Exercise 13.2 rename to Chapter 13/Exercise_13.2.js diff --git a/Chapter 13/Exercise 13.3 b/Chapter 13/Exercise_13.3.js similarity index 100% rename from Chapter 13/Exercise 13.3 rename to Chapter 13/Exercise_13.3.js diff --git a/Chapter 13/Project 1 b/Chapter 13/Project_1.js similarity index 100% rename from Chapter 13/Project 1 rename to Chapter 13/Project_1.js