diff --git a/Dockerfile b/Dockerfile
index be2ca3d5..d2a13470 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine
+FROM alpine:3.18.3
 COPY helloworld.sh /
 CMD ["/helloworld.sh"]