Show my app first in the list of apps in the UIActivityViewController share dialog for a custom file extension exported by my app

My app exports a custom file type identifier for a file that it exports to share between other users of the same app. However in the list of apps in UIActivityViewController view, my app is listed far off screen. How can I make my app which owns the file type appear first in the list, instead of seeing many irrelevant apps that can't actually open my file?

Plist snippets:

<key>CFBundleDocumentTypes</key>
<array>
	<dict>
		<key>CFBundleTypeName</key>
		<string>My Custom App File</string>
		<key>LSHandlerRank</key>
		<string>Owner</string>
		<key>LSItemContentTypes</key>
		<array>
			<string>abc.myapp.myextension</string>
		</array>
	</dict>
</array>

<key>UTExportedTypeDeclarations</key>
<array>
	<dict>
		<key>UTTypeConformsTo</key>
		<array>
			<string>public.content</string>
			<string>public.data</string>
		</array>
		<key>UTTypeDescription</key>
		<string>My Custom App File</string>
		<key>UTTypeIconFiles</key>
		<array/>
		<key>UTTypeIdentifier</key>
		<string>abc.myapp.myextension</string>
		<key>UTTypeTagSpecification</key>
		<dict>
			<key>public.filename-extension</key>
			<array>
				<string>myextension</string>
			</array>
			<key>public.mime-type</key>
			<array>
				<string>application/octet-stream</string>
			</array>
		</dict>
	</dict>
</array>