diff --git a/Dockerfile b/Dockerfile
index 73cb0813..d594f3b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ ADD ./ /app
 WORKDIR /app
 RUN pip install -r requirements.txt
 VOLUME /data
+VOLUME /tmp
 ENV USERNAME example
 ENV PASSWORD examplePassword
-ENTRYPOINT ["python", "-m", "garminworkouts", "--cookie-jar", "/data/.garmin-cookies.txt"] 
+ENTRYPOINT ["python", "-m", "garminworkouts", "--cookie-jar", "/tmp/.garmin-cookies.txt"] 
diff --git a/README.md b/README.md
index c3f21fce..5034d334 100644
--- a/README.md
+++ b/README.md
@@ -260,4 +260,9 @@ docker build --load -t ${IMAGE} .
 docker run --env-file=./.env -v /tmp/garmin:/data -ti ${IMAGE} [your command and arguments: list, export, etc.]
 # alternatively you can use this wrapper
 ./dockerwrap.sh [your command and arguments: list, export, etc.]
+# in case you want to export to a directory, you need to use /data
+# inside the container and point DATADIR to the local dir where to
+# write the data (./ by default).
+export DATADIR=/path/where/to/store/data/locally
+./dockerwrap.sh export /data
 ```
diff --git a/dockerwrap.sh b/dockerwrap.sh
index 6f841765..9db60852 100755
--- a/dockerwrap.sh
+++ b/dockerwrap.sh
@@ -4,5 +4,5 @@ set -u
 IMAGE="${IMAGE}"
 ENVFILE="${ENVFILE-.env}"
 TMPDIR="${TMPDIR-/tmp/garmin}"
-
-exec docker run --env-file=${ENVFILE} -v ${TMPDIR}:/data -ti ${IMAGE} $@
+DATADIR="${DATADIR-./}"
+exec docker run --env-file=${ENVFILE} -v ${TMPDIR}:/tmp -v ${DATADIR}:/data/ -ti ${IMAGE} $@