diff --git a/src/cmd/cos_gpu_installer/Dockerfile b/src/cmd/cos_gpu_installer/Dockerfile
index 9df8996..5cfcb29 100644
--- a/src/cmd/cos_gpu_installer/Dockerfile
+++ b/src/cmd/cos_gpu_installer/Dockerfile
@@ -6,7 +6,7 @@
 RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o cos-gpu-installer main.go
 
 # Dockerfile for the COS GPU Installer container.
-FROM debian:9
+FROM debian:bookworm
 LABEL maintainer="cos-containers@google.com"
 
 COPY --from=cos-gpu-installer-go-builder /work/src/cmd/cos_gpu_installer/cos-gpu-installer /cos-gpu-installer
diff --git a/src/cmd/cos_gpu_installer_v1/cos-gpu-installer-docker/Dockerfile b/src/cmd/cos_gpu_installer_v1/cos-gpu-installer-docker/Dockerfile
index 4feebb7..d59c1ba 100644
--- a/src/cmd/cos_gpu_installer_v1/cos-gpu-installer-docker/Dockerfile
+++ b/src/cmd/cos_gpu_installer_v1/cos-gpu-installer-docker/Dockerfile
@@ -14,7 +14,7 @@
 #
 # Dockerfile for the COS GPU Installer container.
 
-FROM debian:9
+FROM debian:bookworm
 LABEL maintainer="cos-containers@google.com"
 
 # Install minimal tools needed to build kernel modules.