diff --git a/security/snort3/Makefile b/security/snort3/Makefile
index 97109a833092..10502c9fbb5f 100644
--- a/security/snort3/Makefile
+++ b/security/snort3/Makefile
@@ -60,6 +60,9 @@ STATICDAQ_CMAKE_BOOL=		ENABLE_STATIC_DAQ
 THREADSANITIZER_CMAKE_BOOL=	ENABLE_THREAD_SANITIZER
 TSC_CMAKE_BOOL=			ENABLE_TSC_CLOCK
 
+DOCS_USE=			ruby=yes
+DOCS_VARS=			ruby_no_run_depends=yes
+
 .include <bsd.port.options.mk>
 
 .if ${ARCH:Mpowerpc64*}
@@ -76,4 +79,7 @@ post-patch:
 	${REINPLACE_CMD} -e 's|_LIBDIR}/pkgconfig|_PREFIX}/libdata/pkgconfig|g' \
 		${WRKSRC}/cmake/create_pkg_config.cmake
 
+post-stage-DOCS-on:
+	${RUBY} ${WRKSRC}/doc/upgrade/get_differences.rb ${WRKSRC}/tools/snort2lua > ${STAGEDIR}${PREFIX}/share/doc/snort/config_changes.txt
+
 .include <bsd.port.mk>