diff --git a/x11-toolkits/gtk40/Makefile b/x11-toolkits/gtk40/Makefile
index 37c3fed1b2cc..f67971779e1e 100644
--- a/x11-toolkits/gtk40/Makefile
+++ b/x11-toolkits/gtk40/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	gtk
-PORTVERSION=	4.18.2
+PORTVERSION=	4.18.3
 CATEGORIES=	x11-toolkits
 MASTER_SITES=	GNOME
 PKGNAMESUFFIX=	4
@@ -38,10 +38,11 @@ LDFLAGS+=	-lexecinfo
 
 BINARY_ALIAS=	python3=${PYTHON_CMD}
 
-LIBVERSION=	1.1800.2
+LIBVERSION=	1.1800.3
 PLIST_SUB+=	LIBVERSION=${LIBVERSION}
 
 GLIB_SCHEMAS=	org.gtk.Demo4.gschema.xml \
+		org.gtk.gtk4.Inspector.gschema.xml \
 		org.gtk.gtk4.Settings.ColorChooser.gschema.xml \
 		org.gtk.gtk4.Settings.Debug.gschema.xml \
 		org.gtk.gtk4.Settings.EmojiChooser.gschema.xml \
diff --git a/x11-toolkits/gtk40/distinfo b/x11-toolkits/gtk40/distinfo
index 46872d752c7e..1718bcab796f 100644
--- a/x11-toolkits/gtk40/distinfo
+++ b/x11-toolkits/gtk40/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1742166889
-SHA256 (gnome/gtk-4.18.2.tar.xz) = cca5677be4c3e501b49f1c50bcafacba8dcf4bd3a2d016388f834eff274dc159
-SIZE (gnome/gtk-4.18.2.tar.xz) = 17711040
+TIMESTAMP = 1743252329
+SHA256 (gnome/gtk-4.18.3.tar.xz) = 081e1bc0b17db41a935af8d1f6f090fb1988936c42ff734d149f3d004119f8bb
+SIZE (gnome/gtk-4.18.3.tar.xz) = 17702392