diff --git a/Dockerfile b/Dockerfile
index 69137c40..ab69ac93 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -55,7 +55,7 @@ RUN yarn && yarn cache clean
 
 COPY --chown=$USER:$GROUP . $APPDIR
 
-ADD https://truststore.pki.rds.amazonaws.com/eu-west-2/eu-west-2-bundle.pem $CERTDIR/
+RUN curl -o $CERTDIR/eu-west-2-bundle.pem https://truststore.pki.rds.amazonaws.com/eu-west-2/eu-west-2-bundle.pem
 
 USER root
 RUN chown -R $USER:$GROUP $CERTDIR &&\