diff --git a/phpBB/web.config b/phpBB/web.config
index a73c328626..99a1fe6023 100644
--- a/phpBB/web.config
+++ b/phpBB/web.config
@@ -1,6 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
 	<system.webServer>
+		<rewrite>
+			<rules>
+				<rule name="Extension Routes" stopProcessing="true">
+					<match url="^(.*)$" ignoreCase="true" />
+					<conditions>
+						<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
+						<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" negate="true" />
+					</conditions>
+					<action type="Rewrite" url="app.php" appendQueryString="true" />
+				</rule>
+			</rules>
+		</rewrite>
 		<security>
 			<requestFiltering>
 				<hiddenSegments>