diff --git a/inputmethod/libchewing/Makefile b/inputmethod/libchewing/Makefile
index 1e237b10f24f..8e7121fafa2c 100644
--- a/inputmethod/libchewing/Makefile
+++ b/inputmethod/libchewing/Makefile
@@ -1,10 +1,11 @@
-# $NetBSD: Makefile,v 1.27 2020/11/05 09:06:56 ryoon Exp $
+# $NetBSD: Makefile,v 1.28 2021/02/20 21:22:04 ryoon Exp $
 #
 
-DISTNAME=	libchewing-0.4.0
-PKGREVISION=	15
+GITHUB_PROJECT=	libchewing
+GITHUB_RELEASE=	v${PKGVERSION_NOREV}
+DISTNAME=	libchewing-0.5.1
 CATEGORIES=	chinese inputmethod
-MASTER_SITES=	https://github.com/chewing/libchewing/releases/download/v${PKGVERSION_NOREV}/
+MASTER_SITES=	${MASTER_SITE_GITHUB:=chewing/}
 EXTRACT_SUFX=	.tar.bz2
 
 MAINTAINER=	pkgsrc-users@NetBSD.org
diff --git a/inputmethod/libchewing/distinfo b/inputmethod/libchewing/distinfo
index e4938207a8d9..796b69e6c431 100644
--- a/inputmethod/libchewing/distinfo
+++ b/inputmethod/libchewing/distinfo
@@ -1,8 +1,6 @@
-$NetBSD: distinfo,v 1.9 2015/11/03 22:13:37 agc Exp $
+$NetBSD: distinfo,v 1.10 2021/02/20 21:22:04 ryoon Exp $
 
-SHA1 (libchewing-0.4.0.tar.bz2) = 7409b0a6753e14510c96574714dcec86c7b10138
-RMD160 (libchewing-0.4.0.tar.bz2) = 7abc4191e0295d566b1409c12d593ee0e4b50637
-SHA512 (libchewing-0.4.0.tar.bz2) = 6a9b12816c13d7b4a0a3ca9e73560fcbb8d3e032aab3f5b90f40a6de9e7d81e934536242b4ac26db33739c7841185cc4aa10a8272cd26a76c27bdac6e75aa4a9
-Size (libchewing-0.4.0.tar.bz2) = 3014558 bytes
-SHA1 (patch-configure) = 2f855e174fa486932dea90d013e525c1c5ef24a1
-SHA1 (patch-configure.ac) = 2a47e597f14cf363055f5b8409289f6edbc544e2
+SHA1 (libchewing-0.5.1.tar.bz2) = b5c8b920b414e74de69c7e0200dac3d3fa9e9e14
+RMD160 (libchewing-0.5.1.tar.bz2) = 4d6b48f8a40c99b5c36539a255368e0a622d5f78
+SHA512 (libchewing-0.5.1.tar.bz2) = a6551661bb5e56bba59730b93b373db56af7d42f2ab4881fbfff8727689dd2604d42d2e5c0b04820df66a431dfb5fcb73cc5c9b538615da76198ee3635501c1f
+Size (libchewing-0.5.1.tar.bz2) = 3141084 bytes
diff --git a/inputmethod/libchewing/patches/patch-configure b/inputmethod/libchewing/patches/patch-configure
deleted file mode 100644
index 297e9b6092f5..000000000000
--- a/inputmethod/libchewing/patches/patch-configure
+++ /dev/null
@@ -1,49 +0,0 @@
-$NetBSD: patch-configure,v 1.2 2014/08/02 04:54:07 obache Exp $
-
-* test(1) portability fix
-  https://github.com/chewing/libchewing/pull/158
-
---- configure.orig	2014-04-11 01:49:45.000000000 +0000
-+++ configure
-@@ -13212,7 +13212,7 @@ else
-   with_sqlite3=yes
- fi
- 
-- if test x"$with_sqlite3" == x"yes"; then
-+ if test x"$with_sqlite3" = x"yes"; then
-   WITH_SQLITE3_TRUE=
-   WITH_SQLITE3_FALSE='#'
- else
-@@ -13229,7 +13229,7 @@ else
-   with_internal_sqlite3=no
- fi
- 
-- if test x"$with_internal_sqlite3" == x"yes"; then
-+ if test x"$with_internal_sqlite3" = x"yes"; then
-   WITH_INTERNAL_SQLITE3_TRUE=
-   WITH_INTERNAL_SQLITE3_FALSE='#'
- else
-@@ -13239,12 +13239,12 @@ fi
- 
- 
- # for sqlite
--if test x"$with_sqlite3" == x"yes"; then :
-+if test x"$with_sqlite3" = x"yes"; then :
- 
- 
- $as_echo "#define WITH_SQLITE3 1" >>confdefs.h
- 
--       if test x"$with_internal_sqlite3" == x"no"; then :
-+       if test x"$with_internal_sqlite3" = x"no"; then :
- 
-               { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sqlite3_open" >&5
- $as_echo_n "checking for library containing sqlite3_open... " >&6; }
-@@ -14065,7 +14065,7 @@ CC_FOR_BUILD=${CC_FOR_BUILD-${CC}}
- AM_CFLAGS="$AM_CFLAGS -Wall $CFLAGS"
- 
- # Add '_GNU_SOURCE' for asprintf
--if test x$ac_cv_func_asprintf == xyes; then :
-+if test x$ac_cv_func_asprintf = xyes; then :
-   DEFAULT_CPPFLAGS="$DEFAULT_CPPFLAGS -D_GNU_SOURCE"
- fi
- 
diff --git a/inputmethod/libchewing/patches/patch-configure.ac b/inputmethod/libchewing/patches/patch-configure.ac
deleted file mode 100644
index e88682a0cde1..000000000000
--- a/inputmethod/libchewing/patches/patch-configure.ac
+++ /dev/null
@@ -1,39 +0,0 @@
-$NetBSD: patch-configure.ac,v 1.2 2014/08/02 04:54:07 obache Exp $
-
-* test(1) portability fix
-  https://github.com/chewing/libchewing/pull/158
-
---- configure.ac.orig	2014-04-11 01:24:52.000000000 +0000
-+++ configure.ac
-@@ -79,18 +79,18 @@ AC_ARG_WITH([sqlite3],
-             AS_HELP_STRING([--with-sqlite3], [Use sqlite3 to store userphrase @<:@default=yes@:>@]),
-             [],
-             [with_sqlite3=yes])
--AM_CONDITIONAL([WITH_SQLITE3], [test x"$with_sqlite3" == x"yes"])
-+AM_CONDITIONAL([WITH_SQLITE3], [test x"$with_sqlite3" = x"yes"])
- 
- AC_ARG_WITH([internal-sqlite3],
-             AS_HELP_STRING([--with-internal-sqlite3], [Use internal sqlite3 instead of system-wide @<:@default=no@:>@]),
-             [],
-             [with_internal_sqlite3=no])
--AM_CONDITIONAL([WITH_INTERNAL_SQLITE3], [test x"$with_internal_sqlite3" == x"yes"])
-+AM_CONDITIONAL([WITH_INTERNAL_SQLITE3], [test x"$with_internal_sqlite3" = x"yes"])
- 
- # for sqlite
--AS_IF([test x"$with_sqlite3" == x"yes"], [
-+AS_IF([test x"$with_sqlite3" = x"yes"], [
-        AC_DEFINE([WITH_SQLITE3], [1], [Use sqlite3 to store userphrase])
--       AS_IF([test x"$with_internal_sqlite3" == x"no"],
-+       AS_IF([test x"$with_internal_sqlite3" = x"no"],
-              [
-               AC_SEARCH_LIBS([sqlite3_open], [sqlite3],
-                              [AS_IF([test x$ac_cv_search_sqlite3_open != x"none required"],
-@@ -126,7 +126,7 @@ AC_SUBST(CC_FOR_BUILD)
- AM_CFLAGS="$AM_CFLAGS -Wall $CFLAGS"
- 
- # Add '_GNU_SOURCE' for asprintf
--AS_IF([test x$ac_cv_func_asprintf == xyes],
-+AS_IF([test x$ac_cv_func_asprintf = xyes],
-       [DEFAULT_CPPFLAGS="$DEFAULT_CPPFLAGS -D_GNU_SOURCE"])
- 
- AX_WITH_CURSES