diff --git a/INSTALL.md b/INSTALL.md
index 7202685402..e4f16ed601 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -70,6 +70,7 @@ The system that runs the AWX service will need to satisfy the following requirem
 - At least 2 cpu cores
 - At least 20GB of space
 - Running Docker, Openshift, or Kubernetes
+- If you choose to use an external PostreSQL database, please note that the minimum version is 9.4.
 
 ### AWX Tunables