diff --git a/README.md b/README.md
index c23b608..881f95f 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,9 @@ The containers are stored on my gitea instance, so you can pull them like this:
 docker pull gitea.elara.ws/elara6331/golang:latest
 ```
 
+Some of the images use [ko.build](https://github.com/ko-build/ko)
+
 ### Images
 
 - `golang`: An alpine-based image with Go installed
-- `webserver`: A very simple webserver
\ No newline at end of file
+- `webserver`: A very simple webserver
diff --git a/webserver/Dockerfile b/webserver/Dockerfile
deleted file mode 100644
index c6472ad..0000000
--- a/webserver/Dockerfile
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM busybox:latest
-COPY webserver /usr/bin/webserver
-RUN mkdir /html
-ENTRYPOINT webserver
\ No newline at end of file
diff --git a/webserver/README.md b/webserver/README.md
index 94cc1fc..2feb384 100644
--- a/webserver/README.md
+++ b/webserver/README.md
@@ -2,4 +2,6 @@
 
 The [webserver image](https://gitea.elara.ws/Elara6331/-/packages/container/webserver/latest) is a very simple webserver that serves its `/html` directory and logs requests. It doesn't have any TLS capabilities or anything like that, it just serves some static files and does nothing else.
 
-You can change the address it listens on using the `WEBSERVER_ADDR` environment variable.
\ No newline at end of file
+You can change the address it listens on using the `WEBSERVER_ADDR` environment variable.
+
+This image uses [ko.build](https://ko.build)
diff --git a/webserver/build.sh b/webserver/build.sh
index 6e33f8f..95a6c9f 100755
--- a/webserver/build.sh
+++ b/webserver/build.sh
@@ -1,12 +1,7 @@
 #!/bin/bash
 
-if [[ $# == 0 ]]; then
-	echo "Usage: $0 <arch>"
-	exit 1
-fi
-
-GOOS=linux GOARCH=$1 go build -o webserver ./cmd/main.go
-
-docker login gitea.elara.ws
-docker build . -t "gitea.elara.ws/elara6331/webserver:$1"
-docker push "gitea.elara.ws/elara6331/webserver:$1"
+pushd cmd
+KO_DOCKER_REPO=gitea.elara.ws/elara6331 ko build -B \
+	--platform=linux/amd64,linux/arm64,linux/riscv64 \
+	--sbom=none
+popd
diff --git a/webserver/cmd/go.mod b/webserver/cmd/go.mod
new file mode 100644
index 0000000..293f5a3
--- /dev/null
+++ b/webserver/cmd/go.mod
@@ -0,0 +1,3 @@
+module webserver
+
+go 1.21.0
diff --git a/webserver/manifest.sh b/webserver/manifest.sh
deleted file mode 100755
index 11456c1..0000000
--- a/webserver/manifest.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-tag="$1"
-tag="${tag:=latest}"
-
-docker login gitea.elara.ws
-docker manifest create "gitea.elara.ws/elara6331/webserver:$tag" \
-	--amend gitea.elara.ws/elara6331/webserver:amd64 \
-	--amend gitea.elara.ws/elara6331/webserver:arm64 \
-	--amend gitea.elara.ws/elara6331/webserver:riscv64
-docker manifest push "gitea.elara.ws/elara6331/webserver:$tag"