diff --git a/samples/bookinfo/src/details/Dockerfile b/samples/bookinfo/src/details/Dockerfile
index 510802594fb..1ffec62a19c 100644
--- a/samples/bookinfo/src/details/Dockerfile
+++ b/samples/bookinfo/src/details/Dockerfile
@@ -12,7 +12,7 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-FROM ruby:2.7.1-slim
+FROM ruby:2.7.8-slim
 
 COPY details.rb /opt/microservices/