diff --git a/scripts/build-runtime.sh b/scripts/build-runtime.sh
index 39f98e4..3ce3b91 100755
--- a/scripts/build-runtime.sh
+++ b/scripts/build-runtime.sh
@@ -34,6 +34,8 @@ runtime="$(file -L /bin/bash)"
 
 if [[ "$runtime" =~ 80386 ]]; then
     architecture=i686
+elif [[ "$runtime" =~ i386 ]]; then
+    architecture=i686
 elif [[ "$runtime" =~ aarch64 ]]; then
     architecture=aarch64
 elif [[ "$runtime" =~ EABI5 ]]; then
diff --git a/scripts/docker/Dockerfile b/scripts/docker/Dockerfile
index e89bcd6..f78133d 100644
--- a/scripts/docker/Dockerfile
+++ b/scripts/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
 # includes dependencies from https://git.alpinelinux.org/aports/tree/main/fuse3/APKBUILD
 RUN apk add --no-cache \