diff --git a/docker/bionic/Dockerfile b/docker/bionic/Dockerfile
index 1ed1f88..757840f 100644
--- a/docker/bionic/Dockerfile
+++ b/docker/bionic/Dockerfile
@@ -63,7 +63,7 @@ RUN apt-get install -yq --no-install-suggests --no-install-recommends \
 RUN rm -rf /var/lib/apt/lists/*
 
 # travis2bash
-RUN cp /usr/src/buildbot-scripts/travis2bash.sh /usr/local/bin
+COPY /usr/src/buildbot-scripts/travis2bash.sh /usr/local/bin
 
 #RUN useradd -ms /bin/bash buildbot