diff --git a/.travis.yml b/.travis.yml
index 1b48d6e..5471fb8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,4 +3,4 @@ services:
   - docker
 language: ruby
 before_install:
-  - docker build --file=docker/Dockerfile-Ubuntu --tag=v4.0.0:affdex
+  - docker build --file=docker/Dockerfile-Ubuntu --tag=v4.0.0:affdex .