diff --git a/.appveyor.yml b/.appveyor.yml
index 9307ff1..2d9d2d0 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -5,6 +5,7 @@ environment:
     - nodejs_version: "12"
     - nodejs_version: "11"
     - nodejs_version: "10"
+    - nodejs_version: "9"
 
 # Install scripts. (runs after repo cloning)
 install: