diff --git a/multimedia/libgav1/Makefile b/multimedia/libgav1/Makefile
index 1d8b7c4f8a8e..ba908c8797eb 100644
--- a/multimedia/libgav1/Makefile
+++ b/multimedia/libgav1/Makefile
@@ -1,22 +1,21 @@
 
 PORTNAME=	libgav1
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.16.0
-PORTREVISION=	1
+DISTVERSION=	0.16.3
 CATEGORIES=	multimedia
 
 MAINTAINER=	jbeich@FreeBSD.org
 COMMENT=	Main profile (0) & High profile (1) compliant AV1 decoder
 
 LICENSE=	APACHE20
 
 LIB_DEPENDS=	libabsl_synchronization.so:devel/abseil
 
 USES=		cmake compiler:c++17-lang localbase:ldflags
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 GH_ACCOUNT=	jbeich # mirror
 CMAKE_ON=	BUILD_SHARED_LIBS
 LDFLAGS+=	-Wl,--as-needed # avoid overlinking (abseil deps)
 
 .include <bsd.port.mk>
diff --git a/multimedia/libgav1/distinfo b/multimedia/libgav1/distinfo
index 6ea1efb7537b..ac607ec6d834 100644
--- a/multimedia/libgav1/distinfo
+++ b/multimedia/libgav1/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1594780074
-SHA256 (jbeich-libgav1-v0.16.0_GH0.tar.gz) = d9563c70f42466ba4a01a230a8dbbddf8f3a470a695c28a51c23dc246f04e51e
-SIZE (jbeich-libgav1-v0.16.0_GH0.tar.gz) = 713762
+TIMESTAMP = 1618365301
+SHA256 (jbeich-libgav1-v0.16.3_GH0.tar.gz) = 30ef78bf79c21d890e049b565ba99a124fd2d27095bd51ac2e63549780ee5a10
+SIZE (jbeich-libgav1-v0.16.3_GH0.tar.gz) = 921201
diff --git a/multimedia/libgav1/files/patch-CMakeLists.txt b/multimedia/libgav1/files/patch-CMakeLists.txt
index 412ece1b78af..0a99df02b5a1 100644
--- a/multimedia/libgav1/files/patch-CMakeLists.txt
+++ b/multimedia/libgav1/files/patch-CMakeLists.txt
@@ -1,28 +1,33 @@
 - Sync -std= with devel/abseil to match ABI
 - Avoid leaking abseil dependency to shared library consumers
 
---- CMakeLists.txt.orig	2020-07-15 02:27:54 UTC
+--- CMakeLists.txt.orig	2021-04-14 01:55:01 UTC
 +++ CMakeLists.txt
 @@ -16,8 +16,8 @@
  cmake_minimum_required(VERSION 3.7.1 FATAL_ERROR)
  
  # libgav1 requires C++11.
 -set(CMAKE_CXX_STANDARD 11)
 -set(ABSL_CXX_STANDARD 11)
 +set(CMAKE_CXX_STANDARD 17)
 +set(ABSL_CXX_STANDARD 17)
  
  project(libgav1 CXX)
  
-@@ -107,8 +107,11 @@ if(NOT "${LIBGAV1_EXE_LINKER_FLAGS}" STREQUAL "")
-   separate_arguments(LIBGAV1_EXE_LINKER_FLAGS)
- endif()
+@@ -115,6 +115,8 @@ endif()
+ # Set test-only flags based on LIBGAV1_CXX_FLAGS.
+ libgav1_set_test_flags()
  
 +find_package(absl)
-+if (NOT TARGET absl::base)
- add_subdirectory("${libgav1_root}/third_party/abseil-cpp"
-                  "${libgav1_abseil_build}" EXCLUDE_FROM_ALL)
-+endif()
++if(NOT TARGET absl::base)
+ set(libgav1_abseil "${libgav1_root}/third_party/abseil-cpp")
+ if(NOT EXISTS "${libgav1_abseil}")
+   message(
+@@ -127,6 +129,7 @@ if(NOT EXISTS "${libgav1_abseil}")
+       "    https://github.com/abseil/abseil-cpp.git third_party/abseil-cpp")
+ endif()
+ add_subdirectory("${libgav1_abseil}" "${libgav1_abseil_build}" EXCLUDE_FROM_ALL)
++endif() # NOT TARGET absl::base
  
  libgav1_reset_target_lists()
  libgav1_add_dsp_targets()
diff --git a/multimedia/libgav1/pkg-plist b/multimedia/libgav1/pkg-plist
index cd12f247a4c4..df55eaf7ebf0 100644
--- a/multimedia/libgav1/pkg-plist
+++ b/multimedia/libgav1/pkg-plist
@@ -1,13 +1,14 @@
 bin/gav1_decode
 include/gav1/decoder.h
 include/gav1/decoder_buffer.h
 include/gav1/decoder_settings.h
 include/gav1/frame_buffer.h
 include/gav1/status_code.h
 include/gav1/symbol_visibility.h
 include/gav1/version.h
 lib/libgav1.a
 lib/libgav1.so
 lib/libgav1.so.0
+lib/libgav1.so.0.0.0
 libdata/pkgconfig/libgav1.pc
 share/cmake/libgav1-config.cmake