diff --git a/devel/open62541/Makefile b/devel/open62541/Makefile
index 0b3e5a442467..5c4f556f52e8 100644
--- a/devel/open62541/Makefile
+++ b/devel/open62541/Makefile
@@ -1,33 +1,33 @@
 PORTNAME=	open62541
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.4.13
+DISTVERSION=	1.5.5
 CATEGORIES=	devel
 
 MAINTAINER=	nsonack@herrhotzenplotz.de
 COMMENT=	Open source implementation of OPC UA
 WWW=		https://open62541.org/
 
 LICENSE=	MPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake cpe python shebangfix
 SHEBANG_GLOB=	*.py
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 
 PLIST_SUB=	DISTVERSION=${DISTVERSION}
 
 CMAKE_ON=	BUILD_SHARED_LIBS \
 		CMAKE_DISABLE_FIND_PACKAGE_Git
 CMAKE_OFF=	UA_FORCE_WERROR
 
 OPTIONS_DEFINE=		LTO OPENSSL
 OPTIONS_DEFAULT=	LTO OPENSSL
 
 LTO_CMAKE_BOOL=	CMAKE_INTERPROCEDURAL_OPTIMIZATION
 
 OPENSSL_USES=	ssl
 OPENSSL_CMAKE_ON=	-DUA_ENABLE_ENCRYPTION=OPENSSL
 
 .include <bsd.port.mk>
diff --git a/devel/open62541/distinfo b/devel/open62541/distinfo
index 2e4a218a7dec..6e5099160a87 100644
--- a/devel/open62541/distinfo
+++ b/devel/open62541/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1756502035
-SHA256 (open62541-open62541-v1.4.13_GH0.tar.gz) = 491f8c526ecd6f2240f29cf3a00b0498587474b8f0ced1b074589f54533542aa
-SIZE (open62541-open62541-v1.4.13_GH0.tar.gz) = 4220294
+TIMESTAMP = 1784198721
+SHA256 (open62541-open62541-v1.5.5_GH0.tar.gz) = a5f3d15eab72afb2ed67838b71f0d2c4c09b880d003857f71fc17b7279f2d397
+SIZE (open62541-open62541-v1.5.5_GH0.tar.gz) = 8305273
diff --git a/devel/open62541/files/patch-arch_posix_eventloop__posix.h b/devel/open62541/files/patch-arch_posix_eventloop__posix.h
new file mode 100644
index 000000000000..694f3fd25651
--- /dev/null
+++ b/devel/open62541/files/patch-arch_posix_eventloop__posix.h
@@ -0,0 +1,12 @@
+--- arch/posix/eventloop_posix.h.orig	2026-07-16 11:01:44 UTC
++++ arch/posix/eventloop_posix.h
+@@ -277,7 +277,9 @@ typedef int SOCKET;
+ 
+ #ifndef __ANDROID__
+ #ifndef __APPLE__
++#ifndef __FreeBSD__
+ #include <bits/stdio_lim.h>
++#endif /* !__FreeBSD__ */
+ #endif /* !__APPLE__ */
+ #endif /* !__ANDROID__ */
+ 
diff --git a/devel/open62541/pkg-plist b/devel/open62541/pkg-plist
index e07acbb6b0ae..a2acf39ab191 100644
--- a/devel/open62541/pkg-plist
+++ b/devel/open62541/pkg-plist
@@ -1,73 +1,71 @@
 %%DATADIR%%/certs/create_self-signed.py
 %%DATADIR%%/certs/localhost.cnf
+%%DATADIR%%/certs/localhost_ecc.cnf
+%%DATADIR%%/generate_bsd.py
 %%DATADIR%%/generate_datatypes.py
 %%DATADIR%%/generate_nodeid_header.py
 %%DATADIR%%/generate_statuscode_descriptions.py
 %%DATADIR%%/nodeset_compiler/NodeID_NS0_Base.txt
 %%DATADIR%%/nodeset_compiler/README.md
 %%DATADIR%%/nodeset_compiler/__init__.py
 %%DATADIR%%/nodeset_compiler/backend_graphviz.py
 %%DATADIR%%/nodeset_compiler/backend_open62541.py
-%%DATADIR%%/nodeset_compiler/backend_open62541_datatypes.py
-%%DATADIR%%/nodeset_compiler/backend_open62541_nodes.py
-%%DATADIR%%/nodeset_compiler/backend_open62541_typedefinitions.py
 %%DATADIR%%/nodeset_compiler/datatypes.py
 %%DATADIR%%/nodeset_compiler/nodes.py
 %%DATADIR%%/nodeset_compiler/nodeset.py
 %%DATADIR%%/nodeset_compiler/nodeset_compiler.py
-%%DATADIR%%/nodeset_compiler/nodeset_testing.py
 %%DATADIR%%/nodeset_compiler/opaque_type_mapping.py
 %%DATADIR%%/nodeset_compiler/type_parser.py
 %%DATADIR%%/schema/NodeIds.csv
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.DiagnosticsMinimal.xml
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.EventsMinimal.xml
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.HistorizingMinimal.xml
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.Part8_Subset.xml
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.PubSubMinimal.xml
 %%DATADIR%%/schema/Opc.Ua.NodeSet2.Reduced.xml
 %%DATADIR%%/schema/Opc.Ua.Types.bsd
 %%DATADIR%%/schema/StatusCode.csv
 include/open62541/client.h
 include/open62541/client_config_default.h
 include/open62541/client_highlevel.h
 include/open62541/client_highlevel_async.h
 include/open62541/client_subscriptions.h
 include/open62541/common.h
 include/open62541/config.h
 include/open62541/nodeids.h
 include/open62541/plugin/accesscontrol.h
 include/open62541/plugin/accesscontrol_default.h
+include/open62541/plugin/certificategroup.h
+include/open62541/plugin/certificategroup_default.h
 include/open62541/plugin/create_certificate.h
 include/open62541/plugin/eventloop.h
 include/open62541/plugin/historydata/history_data_backend.h
 include/open62541/plugin/historydata/history_data_backend_memory.h
 include/open62541/plugin/historydata/history_data_gathering.h
 include/open62541/plugin/historydata/history_data_gathering_default.h
 include/open62541/plugin/historydata/history_database_default.h
 include/open62541/plugin/historydatabase.h
 include/open62541/plugin/log.h
 include/open62541/plugin/log_stdout.h
 include/open62541/plugin/log_syslog.h
 include/open62541/plugin/nodestore.h
 include/open62541/plugin/nodestore_default.h
-include/open62541/plugin/pki.h
-include/open62541/plugin/pki_default.h
 include/open62541/plugin/securitypolicy.h
 include/open62541/plugin/securitypolicy_default.h
+include/open62541/pubsub.h
 include/open62541/server.h
 include/open62541/server_config_default.h
 include/open62541/server_config_file_based.h
 include/open62541/server_pubsub.h
 include/open62541/statuscodes.h
 include/open62541/types.h
 include/open62541/types_generated.h
-include/open62541/types_generated_handling.h
 include/open62541/util.h
 lib/cmake/open62541/open62541Config.cmake
 lib/cmake/open62541/open62541ConfigVersion.cmake
 lib/cmake/open62541/open62541Macros.cmake
 lib/cmake/open62541/open62541Targets-%%CMAKE_BUILD_TYPE%%.cmake
 lib/cmake/open62541/open62541Targets.cmake
 lib/libopen62541.so
-lib/libopen62541.so.1.4
 lib/libopen62541.so.%%DISTVERSION%%
+lib/libopen62541.so.1.5