diff --git a/backend.md b/backend.md
index 0034df9..9317fc4 100644
--- a/backend.md
+++ b/backend.md
@@ -1,5 +1,16 @@
 # Backend
 
+## Entity-Relationship Diagrams [ERD]
+
+All ```boxcar``` projects include the following gem:
+
+```
+https://github.com/voormedia/rails-erd
+```
+
+The gem is installed and set to auto-update a file named ```ER_Model.pdf``` after each migration.
+This file is linked to in the ```README.md``` for documentation purposes.
+
 ## Python
 
 ### Best Practices
@@ -27,4 +38,8 @@ Consider the above folder structure. If you start the app by running `python mai
 from package1 import module1
 from package1.module2 import function1
 from package2.subpackage1.module5 import function2
+<<<<<<< HEAD
+```
+=======
 ```
+>>>>>>> c95fd600b839fb556cb793de912278ab9d5ffe85