diff --git a/devel/taskflow/Makefile b/devel/taskflow/Makefile
index d36d5a0fb736..2797f0e2eeca 100644
--- a/devel/taskflow/Makefile
+++ b/devel/taskflow/Makefile
@@ -1,25 +1,25 @@
 PORTNAME=	taskflow
 DISTVERSIONPREFIX=	v
-DISTVERSION=	3.3.0
+DISTVERSION=	3.4.0
 CATEGORIES=	devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Header-only library for parallel tasks in modern C++
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake compiler:c++17-lang
 USE_GITHUB=	yes
 
 CMAKE_OFF=	TF_BUILD_CUDA TF_BUILD_TESTS TF_BUILD_EXAMPLES
 
 NO_ARCH=	yes
 
 do-test:
 	@cd ${BUILD_WRKSRC} && \
 		${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} -DBUILD_TESTING:BOOL=ON -DTF_BUILD_TESTS:BOOL=ON ${CMAKE_SOURCE_PATH} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} ${ALL_TARGET} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} test
 
 .include <bsd.port.mk>
diff --git a/devel/taskflow/distinfo b/devel/taskflow/distinfo
index ea0c2b71e756..d797f1bd506c 100644
--- a/devel/taskflow/distinfo
+++ b/devel/taskflow/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1641520068
-SHA256 (taskflow-taskflow-v3.3.0_GH0.tar.gz) = 66b891f706ba99a5ca5ed239d520ad6943ebe94728d1c89e07a939615a6488ef
-SIZE (taskflow-taskflow-v3.3.0_GH0.tar.gz) = 64446007
+TIMESTAMP = 1653417822
+SHA256 (taskflow-taskflow-v3.4.0_GH0.tar.gz) = 8f449137d3f642b43e905aeacdf1d7c5365037d5e1586103ed4f459f87cecf89
+SIZE (taskflow-taskflow-v3.4.0_GH0.tar.gz) = 64152239
diff --git a/devel/taskflow/pkg-plist b/devel/taskflow/pkg-plist
index 7d360c56652d..c2840735164d 100644
--- a/devel/taskflow/pkg-plist
+++ b/devel/taskflow/pkg-plist
@@ -1,73 +1,71 @@
 include/taskflow/algorithm/critical.hpp
 include/taskflow/algorithm/for_each.hpp
 include/taskflow/algorithm/pipeline.hpp
 include/taskflow/algorithm/reduce.hpp
 include/taskflow/algorithm/sort.hpp
 include/taskflow/algorithm/transform.hpp
 include/taskflow/core/declarations.hpp
 include/taskflow/core/environment.hpp
 include/taskflow/core/error.hpp
 include/taskflow/core/executor-module-opt.hpp
 include/taskflow/core/executor.hpp
 include/taskflow/core/flow_builder.hpp
 include/taskflow/core/graph.hpp
 include/taskflow/core/notifier.hpp
 include/taskflow/core/observer.hpp
 include/taskflow/core/semaphore.hpp
 include/taskflow/core/task.hpp
 include/taskflow/core/taskflow.hpp
 include/taskflow/core/topology.hpp
 include/taskflow/core/tsq.hpp
 include/taskflow/core/worker.hpp
 include/taskflow/cuda/algorithm/find.hpp
 include/taskflow/cuda/algorithm/for_each.hpp
 include/taskflow/cuda/algorithm/matmul.hpp
 include/taskflow/cuda/algorithm/merge.hpp
 include/taskflow/cuda/algorithm/reduce.hpp
 include/taskflow/cuda/algorithm/scan.hpp
 include/taskflow/cuda/algorithm/sort.hpp
 include/taskflow/cuda/algorithm/transform.hpp
 include/taskflow/cuda/algorithm/transpose.hpp
 include/taskflow/cuda/cuda_capturer.hpp
 include/taskflow/cuda/cuda_device.hpp
 include/taskflow/cuda/cuda_error.hpp
 include/taskflow/cuda/cuda_execution_policy.hpp
 include/taskflow/cuda/cuda_graph.hpp
 include/taskflow/cuda/cuda_memory.hpp
 include/taskflow/cuda/cuda_meta.hpp
 include/taskflow/cuda/cuda_optimizer.hpp
 include/taskflow/cuda/cuda_pool.hpp
 include/taskflow/cuda/cuda_stream.hpp
 include/taskflow/cuda/cuda_task.hpp
 include/taskflow/cuda/cudaflow.hpp
 include/taskflow/dsl/connection.hpp
 include/taskflow/dsl/dsl.hpp
 include/taskflow/dsl/meta_macro.hpp
 include/taskflow/dsl/task_analyzer.hpp
 include/taskflow/dsl/task_dsl.hpp
 include/taskflow/dsl/task_trait.hpp
 include/taskflow/dsl/tuple_utils.hpp
 include/taskflow/dsl/type_list.hpp
-include/taskflow/sycl/sycl_algorithm/sycl_for_each.hpp
-include/taskflow/sycl/sycl_algorithm/sycl_reduce.hpp
-include/taskflow/sycl/sycl_algorithm/sycl_transform.hpp
+include/taskflow/sycl/algorithm/reduce.hpp
+include/taskflow/sycl/algorithm/sycl_for_each.hpp
+include/taskflow/sycl/algorithm/sycl_transform.hpp
 include/taskflow/sycl/sycl_execution_policy.hpp
-include/taskflow/sycl/sycl_flow.hpp
 include/taskflow/sycl/sycl_graph.hpp
 include/taskflow/sycl/sycl_meta.hpp
 include/taskflow/sycl/sycl_task.hpp
-include/taskflow/syclflow.hpp
+include/taskflow/sycl/syclflow.hpp
 include/taskflow/taskflow.hpp
 include/taskflow/utility/iterator.hpp
 include/taskflow/utility/math.hpp
 include/taskflow/utility/object_pool.hpp
 include/taskflow/utility/os.hpp
-include/taskflow/utility/serializer.hpp
 include/taskflow/utility/singleton.hpp
 include/taskflow/utility/small_vector.hpp
 include/taskflow/utility/stream.hpp
 include/taskflow/utility/traits.hpp
 include/taskflow/utility/uuid.hpp
 lib/cmake/Taskflow/TaskflowConfig.cmake
 lib/cmake/Taskflow/TaskflowConfigVersion.cmake
 lib/cmake/Taskflow/TaskflowTargets.cmake