diff --git a/devel/concurrencpp/Makefile b/devel/concurrencpp/Makefile
index 7c64256d70ec..50facc6bc819 100644
--- a/devel/concurrencpp/Makefile
+++ b/devel/concurrencpp/Makefile
@@ -1,37 +1,38 @@
 PORTNAME=	concurrencpp
 DISTVERSIONPREFIX=	v.
-DISTVERSION=	0.1.4
+DISTVERSION=	0.1.5
 CATEGORIES=	devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ concurrency library: tasks, executors, timers, C++20 coroutines
 WWW=		https://github.com/David-Haim/concurrencpp
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BROKEN_FreeBSD_12=	fatal error: 'semaphore' file not found (missing C++ include <semaphore>)
 
-USES=		cmake compiler:c++17-lang # should be compiler:c++20-lang
+USES=		cmake compiler:c++20-lang
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	David-Haim
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
 .include <bsd.port.options.mk>
 
 .if (${ARCH} == powerpc64le || ${ARCH} == powerpc64 || ${ARCH} == powerpc) && ${OSVERSION} < 1300523
 BUILD_DEPENDS=	llvm13>0:devel/llvm13
 CPP=		${LOCALBASE}/bin/clang-cpp13
 CC=		${LOCALBASE}/bin/clang13
 CXX=		${LOCALBASE}/bin/clang++13
 .endif
 
 do-test: # same as recommended in https://github.com/David-Haim/concurrencpp#building-installing-and-testing
+	# test async_lock_tests never finishes, see https://github.com/David-Haim/concurrencpp/issues/85
 	@cd ${WRKSRC} && \
 		${CMAKE_BIN} -S test -B build/test && \
 		${CMAKE_BIN} --build build/test && \
 		cd build/test && ctest .
 
 .include <bsd.port.mk>
diff --git a/devel/concurrencpp/distinfo b/devel/concurrencpp/distinfo
index 7f57b0f6baab..6c751836f855 100644
--- a/devel/concurrencpp/distinfo
+++ b/devel/concurrencpp/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1640967804
-SHA256 (David-Haim-concurrencpp-v.0.1.4_GH0.tar.gz) = 3ad9424f975b766accc6eaedf4acfe1a20b5fdbb57fa3ae71f400e13d471e86f
-SIZE (David-Haim-concurrencpp-v.0.1.4_GH0.tar.gz) = 113138
+TIMESTAMP = 1664047892
+SHA256 (David-Haim-concurrencpp-v.0.1.5_GH0.tar.gz) = 330150ebe11b3d30ffcb3efdecc184a34cf50a6bd43b68e294a496225d286651
+SIZE (David-Haim-concurrencpp-v.0.1.5_GH0.tar.gz) = 121906
diff --git a/devel/concurrencpp/pkg-plist b/devel/concurrencpp/pkg-plist
index b4b95048b019..f96dd04369a4 100644
--- a/devel/concurrencpp/pkg-plist
+++ b/devel/concurrencpp/pkg-plist
@@ -1,49 +1,51 @@
 include/concurrencpp/concurrencpp.h
 include/concurrencpp/coroutines/coroutine.h
 include/concurrencpp/errors.h
 include/concurrencpp/executors/constants.h
 include/concurrencpp/executors/derivable_executor.h
 include/concurrencpp/executors/executor.h
 include/concurrencpp/executors/executor_all.h
 include/concurrencpp/executors/inline_executor.h
 include/concurrencpp/executors/manual_executor.h
 include/concurrencpp/executors/thread_executor.h
 include/concurrencpp/executors/thread_pool_executor.h
 include/concurrencpp/executors/worker_thread_executor.h
 include/concurrencpp/forward_declarations.h
 include/concurrencpp/platform_defs.h
 include/concurrencpp/results/constants.h
 include/concurrencpp/results/generator.h
 include/concurrencpp/results/impl/consumer_context.h
 include/concurrencpp/results/impl/generator_state.h
 include/concurrencpp/results/impl/lazy_result_state.h
 include/concurrencpp/results/impl/producer_context.h
 include/concurrencpp/results/impl/result_state.h
 include/concurrencpp/results/impl/return_value_struct.h
 include/concurrencpp/results/impl/shared_result_state.h
 include/concurrencpp/results/lazy_result.h
 include/concurrencpp/results/lazy_result_awaitable.h
 include/concurrencpp/results/make_result.h
 include/concurrencpp/results/promises.h
 include/concurrencpp/results/result.h
 include/concurrencpp/results/result_awaitable.h
 include/concurrencpp/results/result_fwd_declarations.h
 include/concurrencpp/results/resume_on.h
 include/concurrencpp/results/shared_result.h
 include/concurrencpp/results/shared_result_awaitable.h
 include/concurrencpp/results/when_result.h
 include/concurrencpp/runtime/constants.h
 include/concurrencpp/runtime/runtime.h
 include/concurrencpp/task.h
+include/concurrencpp/threads/async_lock.h
 include/concurrencpp/threads/binary_semaphore.h
 include/concurrencpp/threads/cache_line.h
+include/concurrencpp/threads/constants.h
 include/concurrencpp/threads/thread.h
 include/concurrencpp/timers/constants.h
 include/concurrencpp/timers/timer.h
 include/concurrencpp/timers/timer_queue.h
 include/concurrencpp/utils/bind.h
 lib/cmake/concurrencppConfig.cmake
 lib/cmake/concurrencppConfigVersion.cmake
 lib/cmake/concurrencppTargets-%%CMAKE_BUILD_TYPE%%.cmake
 lib/cmake/concurrencppTargets.cmake
 lib/libconcurrencpp.so