diff --git a/resources/windows/gpo/en-US/mattermost.adml b/resources/windows/gpo/en-US/mattermost.adml
index 7659db89..07a0bd44 100644
--- a/resources/windows/gpo/en-US/mattermost.adml
+++ b/resources/windows/gpo/en-US/mattermost.adml
@@ -5,6 +5,7 @@
 	<resources >
 		<stringTable >
 			<string id="RequiresMattermost43">Requires Mattermost Desktop 4.3 or later</string>
+            <string id="RequiresMattermost51">Requires Mattermost Desktop 5.1 or later</string>
 			<string id="mattermost">Mattermost</string>
 			
       		<string id="EnableAutoUpdater">EnableAutoUpdater</string>
diff --git a/resources/windows/gpo/mattermost.admx b/resources/windows/gpo/mattermost.admx
index 5d693f03..0f291363 100644
--- a/resources/windows/gpo/mattermost.admx
+++ b/resources/windows/gpo/mattermost.admx
@@ -7,6 +7,7 @@
 	<supportedOn>
 		<definitions>
 			<definition name="RequiresMattermost43" displayName="$(string.RequiresMattermost43)"/>
+            <definition name="RequiresMattermost51" displayName="$(string.RequiresMattermost51)"/>
 		</definitions>
 	</supportedOn>
 	<categories>
@@ -15,7 +16,7 @@
 	<policies>
     	<policy name="EnableAutoUpdater" class="Machine" displayName="$(string.EnableAutoUpdater)" explainText="$(string.EnableAutoUpdaterDescription)" key="Software\Policies\Mattermost" valueName="EnableAutoUpdater">
 			<parentCategory ref="mattermost"/>
-			<supportedOn ref="RequiresMattermost43"/>
+			<supportedOn ref="RequiresMattermost51"/>
 			<enabledValue>
 				<decimal value="1"/>
 			</enabledValue>