diff --git a/docs/setup-dev-environment.md b/docs/setup-dev-environment.md
index f2582a59..7b4447cc 100644
--- a/docs/setup-dev-environment.md
+++ b/docs/setup-dev-environment.md
@@ -67,7 +67,7 @@ sudo apt-get upgrade -y
 Now install some essential tools.
 
 ```bash
-sudo apt-get install -y build-essential git wget curl
+sudo apt-get install -y build-essential git wget curl parallel
 ```
 
 ### :red_circle: Installing PostgreSQL
@@ -308,11 +308,6 @@ This section shows how to load test buildings into the application from OpenStre
 
 #### Load OpenStreetMap test polygons
 
-First install prerequisites.
-```bash
-sudo apt-get install -y parallel
-```
-
 Ensure you have the `colouringlondon` environment activated.
 
 ```bash