diff --git a/Dockerfile b/Dockerfile
index 618281256722b73fb75a16c5b65e3a16b175a90b..5509b38c756cd9ef34553b4fe7d0ab2eef167397 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,6 @@ ADD https://gitlab.labranet.jamk.fi/testautomation-examples/presta-shop-demo/-/a
 RUN apt install gzip
 
 RUN mkdir -p /tmp/data-ps \
-        && unzip -q /tmp/prestashop.zip -d /tmp/data-ps/ \
+        && gunzip -q /tmp/prestashop.zip -d /tmp/data-ps/ \
         && bash /tmp/ps-extractor.sh /tmp/data-ps \
         && rm /tmp/prestashop.zip