diff --git a/Makefile b/Makefile
index 4944316..8ad79c7 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ check:
 	python3 -m pylint flaskapp/
 
 docker:
-	docker build -t ${REPO_OWNER}/${REPO_NAME_SNAKE} .
+	docker build -t ${REPO_OWNER_LOWER}/${REPO_NAME_SNAKE} .
 
 clean:
 	rm -rf flaskapp/__pycache__