diff --git a/Dockerfile b/Dockerfile
index 7e3a32fc..e3a05040 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,8 @@ RUN mkdir -p target && /script/coverage.sh
 
 RUN if [ "x$COVERALLS_TOKEN" = "x" ] ; then \
     echo coverall not enabled ; \
-    else goveralls -coverprofile=.cover/cover.out -service=travis-ci -repotoken $COVERALLS_TOKEN; fi
+    else go get github.com/mattn/goveralls && \
+    goveralls -coverprofile=.cover/cover.out -service=travis-ci -repotoken $COVERALLS_TOKEN; fi
 
 RUN go build -o remark -ldflags "-X main.revision=$(git rev-parse --abbrev-ref HEAD)-$(git describe --abbrev=7 --always --tags)-$(date +%Y%m%d-%H:%M:%S) -s -w" ./app