diff --git a/docker-network.sh b/docker-network.sh
index d6867b4..d6f4626 100644
--- a/docker-network.sh
+++ b/docker-network.sh
@@ -45,7 +45,7 @@ cat <<EOF | sudo tee "$DOCKER_DAEMON_FILE" > /dev/null
 {
     "default-address-pools": [
         {
-            "base": "10.${octet}.0.0/16",
+            "base": "10.${OCTET}.0.0/16",
             "size": 24
         }
     ]