diff --git a/helloworld-shell/Dockerfile b/helloworld-shell/Dockerfile
index 3c25ebae..fc18b251 100644
--- a/helloworld-shell/Dockerfile
+++ b/helloworld-shell/Dockerfile
@@ -18,7 +18,7 @@
 # Use the offical golang image to create a binary.
 # This is based on Debian and sets the GOPATH to /go.
 # https://hub.docker.com/_/golang
-FROM golang:1.25-trixie as builder
+FROM golang:1.26-trixie as builder
 
 # Create and change to the app directory.
 WORKDIR /app
diff --git a/testing/test-cases/module.Dockerfile b/testing/test-cases/module.Dockerfile
index 35480d83..bd1447f2 100644
--- a/testing/test-cases/module.Dockerfile
+++ b/testing/test-cases/module.Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.25 as builder
+FROM golang:1.26 as builder
 
 WORKDIR /app