diff --git a/ci-deadlock-cli/Dockerfile b/ci-deadlock-cli/Dockerfile
index d97d77e23e71619768c27d19644a3de939db7a16..042bbc493dc6db64d41afb5b8e5e16457b2e8c38 100644
--- a/ci-deadlock-cli/Dockerfile
+++ b/ci-deadlock-cli/Dockerfile
@@ -1,6 +1,6 @@
 FROM docker:18.09.6-dind
 
-RUN apk add --update python3-dev py-pip gcc musl-dev
+RUN apk add --update python3-dev py-pip gcc musl-dev maven
 RUN pip3 install --upgrade pip
 RUN pip3 install deadlock-cli