diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 678fe0b..ff3e165 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -7,7 +7,7 @@
 #   - CMake + Ninja for the build system
 #   - xorriso and mtools used internally by grub-mkrescue / grub-mkimage
 
-FROM alpine:3.23
+FROM --platform=linux/amd64 alpine:3.23
 
 RUN apk add --no-cache \
     # Core build tools
@@ -19,6 +19,7 @@ RUN apk add --no-cache \
     git \
     # GRUB image generation
     grub \
+    grub-bios \
     xorriso \
     mtools \
     # QEMU for running the OS