diff --git a/internal/postprocessor/Dockerfile b/internal/postprocessor/Dockerfile
index 2025efb6cdde..8ea387901944 100644
--- a/internal/postprocessor/Dockerfile
+++ b/internal/postprocessor/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.20 as builder
+FROM golang:1.23.3 as builder
 
 # Copy local code to the container image.
 COPY . /postprocessor/