diff --git a/Justfile b/Justfile
index f0872a2..bc2d392 100644
--- a/Justfile
+++ b/Justfile
@@ -27,3 +27,8 @@ build-r-alpine-320 R_VERSION:
     export PLATFORM=alpine-320; \
     export R_VERSION={{R_VERSION}}; \
     make build-r-$PLATFORM
+
+build-r-alpine-321 R_VERSION:
+    export PLATFORM=alpine-321; \
+    export R_VERSION={{R_VERSION}}; \
+    make build-r-$PLATFORM