diff --git a/Dockerfile b/Dockerfile
index 1eefb56..316d2c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.15-alpine as build
+FROM golang:1.23-alpine@sha256:d0b31558e6b3e4cc59f6011d79905835108c919143ebecc58f35965bf79948f4 as build
 RUN apk add git
 
 WORKDIR /go/src/app