diff --git a/Makefile b/Makefile
index 3d1ee6a..b6c85d8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,7 @@ SHELL := /bin/bash
 
 # test
 TEST_CMD := python -m eccodes selfcheck
+TEST2_CMD := grib_ls /samples/icon_global.grib2
 
 # load variables from ./hooks/env
 DATE := ${shell . ./hooks/env && echo $$DATE}
@@ -27,6 +28,7 @@ run-interactive:
 
 test:
 	@docker run --rm -i -t ${IMAGE_NAME} ${TEST_CMD}
+	@docker run --rm -i -t ${IMAGE_NAME} ${TEST2_CMD}
 
 login:
 	@docker login
diff --git a/README.md b/README.md
index 75772df..333b6bb 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 Python and [ECMWF ecCodes](https://github.com/ecmwf/eccodes) packaged in a Docker container to allow for easy processing of GRIB2 and BUFR files.
 
 [![Python Version](https://img.shields.io/badge/python-3.7.9-informational)](https://hub.docker.com/_/python)
-[![ecCodes Version](https://img.shields.io/badge/ecCodes-2.19.0-informational)](https://github.com/ecmwf/eccodes)
-[![ecCodes-Python Version](https://img.shields.io/static/v1?label=eccodes-python&message=1.0.0&color=informational)](https://github.com/ecmwf/eccodes-python)
+[![ecCodes Version](https://img.shields.io/badge/ecCodes-2.18.0-informational)](https://github.com/ecmwf/eccodes)
+[![ecCodes-Python Version](https://img.shields.io/static/v1?label=eccodes-python&message=0.9.9&color=informational)](https://github.com/ecmwf/eccodes-python)
 [![Docker Build Status](https://img.shields.io/docker/cloud/build/deutscherwetterdienst/python-eccodes.svg)](https://hub.docker.com/r/deutscherwetterdienst/python-eccodes)
 [![Docker Pulls](https://img.shields.io/docker/pulls/deutscherwetterdienst/python-eccodes)](https://hub.docker.com/r/deutscherwetterdienst/python-eccodes)
 
diff --git a/hooks/env b/hooks/env
index 0514ab3..bc35dc6 100755
--- a/hooks/env
+++ b/hooks/env
@@ -5,10 +5,10 @@
 
 [ -n "$SOURCE_URL" ]        || SOURCE_URL=https://github.com/deutscherwetterdienst/python-eccodes
 [ -n "$DOCKER_REPO" ]       || DOCKER_REPO=deutscherwetterdienst/python-eccodes
-[ -n "$ECBUILD_VERSION" ]    || ECBUILD_VERSION="3.4.0"
-[ -n "$ECCODES_VERSION" ]    || ECCODES_VERSION="2.19.0"
+[ -n "$ECBUILD_VERSION" ]    || ECBUILD_VERSION="3.3.5"
+[ -n "$ECCODES_VERSION" ]    || ECCODES_VERSION="2.18.0"
 [ -n "$DWD_GRIB_DEFINITIONS_VERSION" ]    || DWD_GRIB_DEFINITIONS_VERSION="2.14.1-1"
-[ -n "$PYTHON_ECCODES_VERSION" ]    || PYTHON_ECCODES_VERSION="1.0.0"
+[ -n "$PYTHON_ECCODES_VERSION" ]    || PYTHON_ECCODES_VERSION="0.9.9"
 [ -n "$PYTHON_VERSION" ]    || PYTHON_VERSION="3.7.9"
 
 [ -n "$SOURCE_BRANCH" ]  || SOURCE_BRANCH=$(git symbolic-ref -q --short HEAD)