diff --git a/devel/rubygem-prometheus-client-mmap/Makefile b/devel/rubygem-prometheus-client-mmap/Makefile
index 852bc42b4115..bb60ac961aae 100644
--- a/devel/rubygem-prometheus-client-mmap/Makefile
+++ b/devel/rubygem-prometheus-client-mmap/Makefile
@@ -1,22 +1,30 @@
 PORTNAME=	prometheus-client-mmap
-DISTVERSION=	0.27.0
+DISTVERSION=	0.28.0
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	mfechner@FreeBSD.org
 COMMENT=	Suite of instrumentation metric primitives
 WWW=		https://gitlab.com/gitlab-org/prometheus-client-mmap
 
 LICENSE=	APACHE20
 
 RUN_DEPENDS=	rubygem-rb_sys>=0.9<1:lang/rubygem-rb_sys
 
 USES=		gem
+# needs to be migrated to rust
+#USES=		cargo gem
+#GEMFILES=	${GEM_NAME}${EXTRACT_SUFX}
+#CARGO_CARGOTOML=	${WRKSRC}/ext/fast_mmaped_file_rs/Cargo.toml
+#CARGO_CARGOLOCK=	${WRKSRC}/ext/fast_mmaped_file_rs/Cargo.lock
+
+# Generate with: make cargo-crates
+# 85dd
 
 .include <bsd.port.options.mk>
 
 .if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
 CONFIGURE_ARGS+=	--with-cflags="-Wno-error=incompatible-function-pointer-types"
 .endif
 
 .include <bsd.port.mk>
diff --git a/devel/rubygem-prometheus-client-mmap/distinfo b/devel/rubygem-prometheus-client-mmap/distinfo
index bb183f34d2f5..e985cad99f82 100644
--- a/devel/rubygem-prometheus-client-mmap/distinfo
+++ b/devel/rubygem-prometheus-client-mmap/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1693634962
-SHA256 (rubygem/prometheus-client-mmap-0.27.0.gem) = 716f57a352e8fa00b3ec24056ae26c64f5f0e6f076244b1e39b57db86b2f7067
-SIZE (rubygem/prometheus-client-mmap-0.27.0.gem) = 90624
+TIMESTAMP = 1695538380
+SHA256 (rubygem/prometheus-client-mmap-0.28.0.gem) = f3e14e8c5d3e5cbec0436620e3f813ab329259db5b34000e93c4ecf5770dcd7b
+SIZE (rubygem/prometheus-client-mmap-0.28.0.gem) = 90624