diff --git a/lib/private/Activity/Event.php b/lib/private/Activity/Event.php
index 97ab7d1c935f5..02cfd75805832 100644
--- a/lib/private/Activity/Event.php
+++ b/lib/private/Activity/Event.php
@@ -259,7 +259,7 @@ public function getRichSubject(): string {
 	}
 
 	/**
-	 * @return array[]
+	 * @return array<string, array<string, string>>
 	 * @since 11.0.0
 	 */
 	public function getRichSubjectParameters(): array {
@@ -335,7 +335,7 @@ public function getRichMessage(): string {
 	}
 
 	/**
-	 * @return array[]
+	 * @return array<string, array<string, string>>
 	 * @since 11.0.0
 	 */
 	public function getRichMessageParameters(): array {
diff --git a/lib/public/Activity/IEvent.php b/lib/public/Activity/IEvent.php
index f204de599b9c8..eba426c5ecffb 100644
--- a/lib/public/Activity/IEvent.php
+++ b/lib/public/Activity/IEvent.php
@@ -121,7 +121,7 @@ public function getParsedSubject(): string;
 	 * See https://github.com/nextcloud/server/issues/1706 for more information.
 	 *
 	 * @param string $subject
-	 * @param array $parameters
+	 * @param array<string, array<string, string>> $parameters
 	 * @return $this
 	 * @throws InvalidValueException if the subject or parameters are invalid
 	 * @since 11.0.0
@@ -136,7 +136,7 @@ public function setRichSubject(string $subject, array $parameters = []): self;
 	public function getRichSubject(): string;
 
 	/**
-	 * @return array[]
+	 * @return array<string, array<string, string>>
 	 * @since 11.0.0
 	 */
 	public function getRichSubjectParameters(): array;
@@ -187,7 +187,7 @@ public function getParsedMessage(): string;
 	 * See https://github.com/nextcloud/server/issues/1706 for more information.
 	 *
 	 * @param string $message
-	 * @param array $parameters
+	 * @param array<string, array<string, string>> $parameters
 	 * @return $this
 	 * @throws \InvalidArgumentException if the message or parameters are invalid
 	 * @since 11.0.0
@@ -202,7 +202,7 @@ public function setRichMessage(string $message, array $parameters = []): self;
 	public function getRichMessage(): string;
 
 	/**
-	 * @return array[]
+	 * @return array<string, array<string, string>>
 	 * @since 11.0.0
 	 */
 	public function getRichMessageParameters(): array;