diff --git a/lang/asn1c/Makefile b/lang/asn1c/Makefile
index afbda18c8ddd..da08be913cc3 100644
--- a/lang/asn1c/Makefile
+++ b/lang/asn1c/Makefile
@@ -1,21 +1,18 @@
 PORTNAME=	asn1c
-PORTVERSION=	0.9.27
-PORTREVISION=	1
-DISTVERSIONPREFIX=	v
+DISTVERSION=	0.9.28
 CATEGORIES=	lang converters security
+MASTER_SITES=	https://github.com/vlm/${PORTNAME}/releases/download/v${DISTVERSION}/
 
 MAINTAINER=	vlm@lionet.info
 COMMENT=	Modern ASN.1 to C compiler
 WWW=		https://lionet.info/asn1c
 
-USE_GITHUB=	yes
-GH_ACCOUNT=	vlm
-GH_PROJECT=	asn1c
+LICENSE=	BSD2CLAUSE
+LICENSE_FILE=	${WRKSRC}/LICENSE
 
-GNU_CONFIGURE=	yes
-GNU_CONFIGURE_MANPREFIX=${PREFIX}/share
-USES=		cpe perl5 gmake
+USES=		cpe gmake perl5
 CPE_VENDOR=	${PORTNAME}_project
+GNU_CONFIGURE=	yes
 SUB_FILES=	pkg-message
 
 .include <bsd.port.mk>
diff --git a/lang/asn1c/distinfo b/lang/asn1c/distinfo
index 4cfca9ccabc6..c1f1df37db46 100644
--- a/lang/asn1c/distinfo
+++ b/lang/asn1c/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1484341227
-SHA256 (vlm-asn1c-v0.9.27_GH0.tar.gz) = e48d161c803743c69f518440aa9da2d7621083aa91735224a5b1d84044d6a8e5
-SIZE (vlm-asn1c-v0.9.27_GH0.tar.gz) = 1646195
+TIMESTAMP = 1768117681
+SHA256 (asn1c-0.9.28.tar.gz) = 8007440b647ef2dd9fb73d931c33ac11764e6afb2437dbe638bb4e5fc82386b9
+SIZE (asn1c-0.9.28.tar.gz) = 1622654
diff --git a/lang/asn1c/pkg-plist b/lang/asn1c/pkg-plist
index dbfa8fca82d0..93801167bd39 100644
--- a/lang/asn1c/pkg-plist
+++ b/lang/asn1c/pkg-plist
@@ -1,122 +1,125 @@
 bin/asn1c
 bin/crfc2asn1.pl
 bin/enber
 bin/unber
-share/man/man1/asn1c.1.gz
-share/man/man1/enber.1.gz
-share/man/man1/unber.1.gz
 %%DATADIR%%/ANY.c
 %%DATADIR%%/ANY.h
 %%DATADIR%%/BIT_STRING.c
 %%DATADIR%%/BIT_STRING.h
 %%DATADIR%%/BMPString.c
 %%DATADIR%%/BMPString.h
 %%DATADIR%%/BOOLEAN.c
 %%DATADIR%%/BOOLEAN.h
 %%DATADIR%%/ENUMERATED.c
 %%DATADIR%%/ENUMERATED.h
 %%DATADIR%%/GeneralString.c
 %%DATADIR%%/GeneralString.h
 %%DATADIR%%/GeneralizedTime.c
 %%DATADIR%%/GeneralizedTime.h
 %%DATADIR%%/GraphicString.c
 %%DATADIR%%/GraphicString.h
 %%DATADIR%%/IA5String.c
 %%DATADIR%%/IA5String.h
 %%DATADIR%%/INTEGER.c
 %%DATADIR%%/INTEGER.h
 %%DATADIR%%/ISO646String.c
 %%DATADIR%%/ISO646String.h
 %%DATADIR%%/NULL.c
 %%DATADIR%%/NULL.h
 %%DATADIR%%/NativeEnumerated.c
 %%DATADIR%%/NativeEnumerated.h
 %%DATADIR%%/NativeInteger.c
 %%DATADIR%%/NativeInteger.h
 %%DATADIR%%/NativeReal.c
 %%DATADIR%%/NativeReal.h
 %%DATADIR%%/NumericString.c
 %%DATADIR%%/NumericString.h
 %%DATADIR%%/OBJECT_IDENTIFIER.c
 %%DATADIR%%/OBJECT_IDENTIFIER.h
 %%DATADIR%%/OCTET_STRING.c
 %%DATADIR%%/OCTET_STRING.h
 %%DATADIR%%/ObjectDescriptor.c
 %%DATADIR%%/ObjectDescriptor.h
 %%DATADIR%%/PrintableString.c
 %%DATADIR%%/PrintableString.h
 %%DATADIR%%/README
 %%DATADIR%%/REAL.c
 %%DATADIR%%/REAL.h
 %%DATADIR%%/RELATIVE-OID.c
 %%DATADIR%%/RELATIVE-OID.h
 %%DATADIR%%/T61String.c
 %%DATADIR%%/T61String.h
 %%DATADIR%%/TeletexString.c
 %%DATADIR%%/TeletexString.h
 %%DATADIR%%/UTCTime.c
 %%DATADIR%%/UTCTime.h
 %%DATADIR%%/UTF8String.c
 %%DATADIR%%/UTF8String.h
 %%DATADIR%%/UniversalString.c
 %%DATADIR%%/UniversalString.h
 %%DATADIR%%/VideotexString.c
 %%DATADIR%%/VideotexString.h
 %%DATADIR%%/VisibleString.c
 %%DATADIR%%/VisibleString.h
 %%DATADIR%%/asn_SEQUENCE_OF.c
 %%DATADIR%%/asn_SEQUENCE_OF.h
 %%DATADIR%%/asn_SET_OF.c
 %%DATADIR%%/asn_SET_OF.h
 %%DATADIR%%/asn_application.h
 %%DATADIR%%/asn_codecs.h
 %%DATADIR%%/asn_codecs_prim.c
 %%DATADIR%%/asn_codecs_prim.h
 %%DATADIR%%/asn_internal.h
 %%DATADIR%%/asn_system.h
 %%DATADIR%%/ber_decoder.c
 %%DATADIR%%/ber_decoder.h
 %%DATADIR%%/ber_tlv_length.c
 %%DATADIR%%/ber_tlv_length.h
 %%DATADIR%%/ber_tlv_tag.c
 %%DATADIR%%/ber_tlv_tag.h
 %%DATADIR%%/constr_CHOICE.c
 %%DATADIR%%/constr_CHOICE.h
 %%DATADIR%%/constr_SEQUENCE.c
 %%DATADIR%%/constr_SEQUENCE.h
 %%DATADIR%%/constr_SEQUENCE_OF.c
 %%DATADIR%%/constr_SEQUENCE_OF.h
 %%DATADIR%%/constr_SET.c
 %%DATADIR%%/constr_SET.h
 %%DATADIR%%/constr_SET_OF.c
 %%DATADIR%%/constr_SET_OF.h
 %%DATADIR%%/constr_TYPE.c
 %%DATADIR%%/constr_TYPE.h
 %%DATADIR%%/constraints.c
 %%DATADIR%%/constraints.h
+%%DATADIR%%/converter-sample.c
 %%DATADIR%%/der_encoder.c
 %%DATADIR%%/der_encoder.h
+%%DATADIR%%/file-dependencies
 %%DATADIR%%/per_decoder.c
 %%DATADIR%%/per_decoder.h
 %%DATADIR%%/per_encoder.c
 %%DATADIR%%/per_encoder.h
 %%DATADIR%%/per_opentype.c
 %%DATADIR%%/per_opentype.h
 %%DATADIR%%/xer_decoder.c
 %%DATADIR%%/xer_decoder.h
 %%DATADIR%%/xer_encoder.c
 %%DATADIR%%/xer_encoder.h
 %%DATADIR%%/xer_support.c
 %%DATADIR%%/xer_support.h
 %%DATADIR%%/per_support.c
 %%DATADIR%%/per_support.h
-%%DATADIR%%/converter-sample.c
-%%DATADIR%%/file-dependencies
-%%DOCSDIR%%/TODO
+%%DATADIR%%/standard-modules/ASN1-Object-Identifier-Module.asn1
+%%DATADIR%%/standard-modules/ASN1C-UsefulInformationObjectClasses.asn1
+%%DATADIR%%/standard-modules/README
 %%DOCSDIR%%/BUGS
 %%DOCSDIR%%/ChangeLog
-%%DOCSDIR%%/COPYING
 %%DOCSDIR%%/FAQ
-%%DOCSDIR%%/README
+%%DOCSDIR%%/INSTALL.md
+%%DOCSDIR%%/README.md
+%%DOCSDIR%%/TODO
 %%DOCSDIR%%/asn1c-quick.pdf
 %%DOCSDIR%%/asn1c-usage.pdf
+share/man/man1/asn1c.1.gz
+share/man/man1/enber.1.gz
+share/man/man1/unber.1.gz