diff --git a/misc/opennn/Makefile b/misc/opennn/Makefile
index 90319fd8f739..ac7c2ef49f1e 100644
--- a/misc/opennn/Makefile
+++ b/misc/opennn/Makefile
@@ -1,45 +1,45 @@
 PORTNAME=	opennn
 DISTVERSIONPREFIX=	v
-DISTVERSION=	5.0.5
-PORTREVISION=	1
+DISTVERSION=	6.0.4
 CATEGORIES=	misc # machine-learning
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Open neural networks library
 WWW=		https://www.opennn.net/
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 USES=		cmake:testing dos2unix
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	Artelnics
 
 DOS2UNIX_FILES=	opennn/CMakeLists.txt
 
+CMAKE_ON=	BUILD_SHARED_LIBS
 CMAKE_OFF=	OpenNN_BUILD_EXAMPLES OpenNN_BUILD_TESTS
 CMAKE_TESTING_ON=	OpenNN_BUILD_TESTS # some tests fail, see https://github.com/Artelnics/opennn/issues/229
 CMAKE_TESTING_TARGET=	tests
 
 LDFLAGS+=	-pthread
 LDFLAGS_powerpc=	-latomic
 
 .if !exists(/usr/include/omp.h)
 LDFLAGS+=	-fopenmp
 USES+=		compiler:gcc-c++11-lib
 .else
 LDFLAGS+=	-lomp # https://github.com/Artelnics/opennn/issues/182
 USES+=		compiler:c++11-lang
 .endif
 
 do-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/include/${PORTNAME} && ${INSTALL_DATA} ${WRKSRC}/${PORTNAME}/*.h ${STAGEDIR}${PREFIX}/include/${PORTNAME}
 	${INSTALL_DATA} ${BUILD_WRKSRC}/${PORTNAME}/libopennn.so ${STAGEDIR}${PREFIX}/lib
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libopennn.so
 
 post-test:
 	@cd ${TEST_WRKSRC} && (${ECHO} suite | tests/tests)
 
 .include <bsd.port.mk>
diff --git a/misc/opennn/distinfo b/misc/opennn/distinfo
index 78998d5b496c..35a32c537960 100644
--- a/misc/opennn/distinfo
+++ b/misc/opennn/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1666513494
-SHA256 (Artelnics-opennn-v5.0.5_GH0.tar.gz) = 8b8545049d085cb769f3a00e93f844061d59debab9ce514e4e91fe988e82b1ac
-SIZE (Artelnics-opennn-v5.0.5_GH0.tar.gz) = 46426854
+TIMESTAMP = 1687057825
+SHA256 (Artelnics-opennn-v6.0.4_GH0.tar.gz) = 3f3bcf491198444d58ea099acf69b3a4e3703b321f3fb08ad9b32e832b400c34
+SIZE (Artelnics-opennn-v6.0.4_GH0.tar.gz) = 20311311
diff --git a/misc/opennn/files/patch-opennn_CMakeLists.txt b/misc/opennn/files/patch-opennn_CMakeLists.txt
deleted file mode 100644
index 3727ab947e95..000000000000
--- a/misc/opennn/files/patch-opennn_CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
---- opennn/CMakeLists.txt.orig	2020-01-03 01:55:58 UTC
-+++ opennn/CMakeLists.txt
-@@ -6,7 +6,7 @@ cmake_minimum_required(VERSION 2.8.10)
- 
- project(opennn)
- 
--add_library(opennn 
-+add_library(opennn SHARED
- adaptive_moment_estimation.cpp
- bounding_layer.cpp
- conjugate_gradient.cpp
diff --git a/misc/opennn/files/patch-opennn_data__set.h b/misc/opennn/files/patch-opennn_data__set.h
new file mode 100644
index 000000000000..a784d1fe923b
--- /dev/null
+++ b/misc/opennn/files/patch-opennn_data__set.h
@@ -0,0 +1,11 @@
+--- opennn/data_set.h.orig	2023-06-18 03:33:58 UTC
++++ opennn/data_set.h
+@@ -30,7 +30,7 @@
+ #include <limits.h>
+ #include <list>
+ #include <filesystem>
+-#include <experimental/filesystem>
++//#include <experimental/filesystem>
+ 
+ #include <regex>
+ #include <codecvt>
diff --git a/misc/opennn/pkg-plist b/misc/opennn/pkg-plist
index 4bf0692971eb..e18361a58466 100644
--- a/misc/opennn/pkg-plist
+++ b/misc/opennn/pkg-plist
@@ -1,47 +1,59 @@
 include/opennn/adaptive_moment_estimation.h
+include/opennn/batch_normalization_layer.h
+include/opennn/bounding_box_regressor_layer.h
 include/opennn/bounding_layer.h
+include/opennn/codification.h
 include/opennn/config.h
 include/opennn/conjugate_gradient.h
 include/opennn/convolutional_layer.h
 include/opennn/correlations.h
 include/opennn/cross_entropy_error.h
 include/opennn/data_set.h
+include/opennn/filesystem.h
+include/opennn/flatten_layer.h
 include/opennn/genetic_algorithm.h
 include/opennn/gradient_descent.h
 include/opennn/growing_inputs.h
 include/opennn/growing_neurons.h
 include/opennn/inputs_selection.h
+include/opennn/json_to_xml.h
 include/opennn/layer.h
 include/opennn/learning_rate_algorithm.h
 include/opennn/levenberg_marquardt_algorithm.h
 include/opennn/long_short_term_memory_layer.h
 include/opennn/loss_index.h
 include/opennn/mean_squared_error.h
 include/opennn/minkowski_error.h
 include/opennn/model_selection.h
 include/opennn/neural_network.h
 include/opennn/neurons_selection.h
+include/opennn/non_max_suppression_layer.h
 include/opennn/normalized_squared_error.h
 include/opennn/numerical_differentiation.h
 include/opennn/opennn.h
+include/opennn/opennn_images.h
 include/opennn/opennn_strings.h
 include/opennn/optimization_algorithm.h
 include/opennn/perceptron_layer.h
 include/opennn/pooling_layer.h
-include/opennn/principal_components_layer.h
 include/opennn/probabilistic_layer.h
 include/opennn/pruning_inputs.h
 include/opennn/quasi_newton_method.h
 include/opennn/recurrent_layer.h
+include/opennn/region_based_object_detector.h
+include/opennn/region_proposal_layer.h
 include/opennn/response_optimization.h
+include/opennn/scaling.h
 include/opennn/scaling_layer.h
 include/opennn/statistics.h
 include/opennn/stochastic_gradient_descent.h
 include/opennn/sum_squared_error.h
+include/opennn/tensor_utilities.h
 include/opennn/testing_analysis.h
+include/opennn/text_analytics.h
 include/opennn/tinyxml2.h
 include/opennn/training_strategy.h
 include/opennn/unit_testing.h
 include/opennn/unscaling_layer.h
 include/opennn/weighted_squared_error.h
 lib/libopennn.so