diff --git a/Dockerfile b/Dockerfile
index ee329e4..023c083 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,6 +43,9 @@ RUN sed -i -e "s/^__version__ =.*/__version__ = \"${TAG}\"/" /app/app.py
 # Stage 3 - final runtime image
 FROM python-alpine
 
+RUN apk --no-cache add \
+    zstd-libs
+
 WORKDIR /app
 COPY --from=build-image /app /app
 
diff --git a/run_tests.sh b/run_tests.sh
index f6ff820..fb40eca 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -9,7 +9,6 @@ buildah copy $ctr dev-requirements.txt .flake8 .
 buildah copy $ctr aws-lambda-rie
 buildah copy $ctr tests/ tests/
 
-buildah run $ctr apk add zstd-libs
 buildah run $ctr pip install -r dev-requirements.txt --target .
 
 buildah run $ctr python -m flake8 app.py