diff --git a/main.tf b/main.tf
index 53e8285..291cf8e 100644
--- a/main.tf
+++ b/main.tf
@@ -93,7 +93,7 @@ resource "aws_instance" "dev_node" {
     user_data = file ("userdata.tpl")
 
     root_block_device {
-        volume_size = 10
+        volume_size = var.volume_size
     }
 
     tags = {