diff --git a/multimedia/assimp/Makefile b/multimedia/assimp/Makefile
index 3aa5e44174e9..8fa28cb389bc 100644
--- a/multimedia/assimp/Makefile
+++ b/multimedia/assimp/Makefile
@@ -1,29 +1,29 @@
 PORTNAME=	assimp
 DISTVERSIONPREFIX=	v
-DISTVERSION=	5.2.5
+DISTVERSION=	5.3.1
 CATEGORIES=	multimedia
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Library to import various 3D model formats in a uniform manner
 WWW=		https://www.assimp.org/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BROKEN_armv6=	field within 'Assimp::MDL::Vertex_MDL7' is less aligned than 'Assimp::MDL::Vertex_MDL7::..., see https://github.com/assimp/assimp/issues/4640
 
 USES=		cmake:testing compiler:c++17-lang cpe localbase:ldflags pkgconfig # minizip is disabled for https://github.com/assimp/assimp/issues/4374
 
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 
 CMAKE_OFF=		ASSIMP_BUILD_TESTS
 CMAKE_ON=		ASSIMP_BUILD_MINIZIP # workaround for https://github.com/assimp/assimp/issues/4374
 CMAKE_TESTING_ON=	ASSIMP_BUILD_TESTS
 CMAKE_TESTING_TARGET=	${ALL_TARGET} # hack to avoid target
 
 post-test: # 1 test fails, see https://github.com/assimp/assimp/issues/4751
 	@cd ${BUILD_WRKSRC} && \
 		${BUILD_WRKSRC}/bin/unit
 
 .include <bsd.port.mk>
diff --git a/multimedia/assimp/distinfo b/multimedia/assimp/distinfo
index 095ba0734d3f..4cfd3cf702d2 100644
--- a/multimedia/assimp/distinfo
+++ b/multimedia/assimp/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1665460183
-SHA256 (assimp-assimp-v5.2.5_GH0.tar.gz) = b5219e63ae31d895d60d98001ee5bb809fb2c7b2de1e7f78ceeb600063641e1a
-SIZE (assimp-assimp-v5.2.5_GH0.tar.gz) = 49543936
+TIMESTAMP = 1695712100
+SHA256 (assimp-assimp-v5.3.1_GH0.tar.gz) = a07666be71afe1ad4bc008c2336b7c688aca391271188eb9108d0c6db1be53f1
+SIZE (assimp-assimp-v5.3.1_GH0.tar.gz) = 52826870
diff --git a/multimedia/assimp/pkg-plist b/multimedia/assimp/pkg-plist
index 8b78ace0dab6..8d6d3a5fdeca 100644
--- a/multimedia/assimp/pkg-plist
+++ b/multimedia/assimp/pkg-plist
@@ -1,96 +1,98 @@
+include/assimp/AssertHandler.h
 include/assimp/Base64.hpp
 include/assimp/BaseImporter.h
 include/assimp/Bitmap.h
 include/assimp/BlobIOSystem.h
 include/assimp/ByteSwapper.h
 include/assimp/ColladaMetaData.h
 include/assimp/Compiler/poppack1.h
 include/assimp/Compiler/pstdint.h
 include/assimp/Compiler/pushpack1.h
 include/assimp/CreateAnimMesh.h
 include/assimp/DefaultIOStream.h
 include/assimp/DefaultIOSystem.h
 include/assimp/DefaultLogger.hpp
 include/assimp/Exceptional.h
 include/assimp/Exporter.hpp
 include/assimp/GenericProperty.h
 include/assimp/GltfMaterial.h
 include/assimp/Hash.h
 include/assimp/IOStream.hpp
 include/assimp/IOStreamBuffer.h
 include/assimp/IOSystem.hpp
 include/assimp/Importer.hpp
 include/assimp/LineSplitter.h
 include/assimp/LogAux.h
 include/assimp/LogStream.hpp
 include/assimp/Logger.hpp
 include/assimp/MathFunctions.h
 include/assimp/MemoryIOWrapper.h
 include/assimp/NullLogger.hpp
 include/assimp/ObjMaterial.h
 include/assimp/ParsingUtils.h
 include/assimp/Profiler.h
 include/assimp/ProgressHandler.hpp
 include/assimp/RemoveComments.h
 include/assimp/SGSpatialSort.h
 include/assimp/SceneCombiner.h
 include/assimp/SkeletonMeshBuilder.h
 include/assimp/SmallVector.h
 include/assimp/SmoothingGroups.h
 include/assimp/SmoothingGroups.inl
 include/assimp/SpatialSort.h
 include/assimp/StandardShapes.h
 include/assimp/StreamReader.h
 include/assimp/StreamWriter.h
 include/assimp/StringComparison.h
 include/assimp/StringUtils.h
 include/assimp/Subdivision.h
 include/assimp/TinyFormatter.h
 include/assimp/Vertex.h
 include/assimp/XMLTools.h
 include/assimp/XmlParser.h
 include/assimp/ZipArchiveIOSystem.h
 include/assimp/aabb.h
 include/assimp/ai_assert.h
 include/assimp/anim.h
 include/assimp/camera.h
 include/assimp/cexport.h
 include/assimp/cfileio.h
 include/assimp/cimport.h
 include/assimp/color4.h
 include/assimp/color4.inl
 include/assimp/commonMetaData.h
 include/assimp/config.h
 include/assimp/defs.h
 include/assimp/fast_atof.h
 include/assimp/importerdesc.h
 include/assimp/light.h
 include/assimp/material.h
 include/assimp/material.inl
 include/assimp/matrix3x3.h
 include/assimp/matrix3x3.inl
 include/assimp/matrix4x4.h
 include/assimp/matrix4x4.inl
 include/assimp/mesh.h
 include/assimp/metadata.h
 include/assimp/pbrmaterial.h
 include/assimp/postprocess.h
 include/assimp/qnan.h
 include/assimp/quaternion.h
 include/assimp/quaternion.inl
 include/assimp/scene.h
 include/assimp/texture.h
 include/assimp/types.h
 include/assimp/vector2.h
 include/assimp/vector2.inl
 include/assimp/vector3.h
 include/assimp/vector3.inl
 include/assimp/version.h
-lib/cmake/assimp-5.2/assimpConfig.cmake
-lib/cmake/assimp-5.2/assimpConfigVersion.cmake
-lib/cmake/assimp-5.2/assimpTargets-%%CMAKE_BUILD_TYPE%%.cmake
-lib/cmake/assimp-5.2/assimpTargets.cmake
+lib/cmake/assimp-5.3/assimpConfig.cmake
+lib/cmake/assimp-5.3/assimpConfigVersion.cmake
+lib/cmake/assimp-5.3/assimpTargets-%%CMAKE_BUILD_TYPE%%.cmake
+lib/cmake/assimp-5.3/assimpTargets.cmake
 lib/libassimp.so
 lib/libassimp.so.5
-lib/libassimp.so.5.2.4
+lib/libassimp.so.5.3.0
+lib/libzlibstatic.a
 libdata/pkgconfig/assimp.pc