diff --git a/Installing-the-OBITools3.md b/Installing-the-OBITools3.md
index ae1de31..c44dfa2 100644
--- a/Installing-the-OBITools3.md
+++ b/Installing-the-OBITools3.md
@@ -2,7 +2,7 @@ The OBITools3 are now available to download from git and PyPI.
 
 # Install with pip
 
-First, make sure you have installed: **python3, python3-venv, pip**
+First, make sure you have installed: **python3, python3-venv, python3-dev, pip, CMake**
 
 Then you can install the OBITools3 in a virtual environment:
 
@@ -21,7 +21,7 @@ Once installed, you will need to be in the virtual environment to run commands (
 
 # Install with git
 
-First, make sure you have installed: **python3, python3-venv, git, CMake**
+First, make sure you have installed: **python3, python3-venv, python3-dev, git, CMake**
 
 Then you can install the OBITools3 in a virtual environment: