diff --git a/build.sh b/build.sh
index 048f657..be9fcc9 100644
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-apk add build-base cmake icu-dev lzo-dev xz-dev zlib-dev samurai jq git curl
+apk add build-base cmake icu-dev lzo-dev xz-dev zlib-dev samurai jq git curl zstd-dev libpng-dev
 mkdir /build
 tag=$(curl -sL https://api.github.com/repos/JGRennison/OpenTTD-patches/releases/latest | jq -r ".tag_name")
 echo "tag: $tag"