diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38faf3df..20b024c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## [0.9.9] - 2nd Jun 2022
+- fix: Added deprecation mention for getUserByMXIDSync.
+
 ## [0.9.8] - 2nd Jun 2022
 - feat: Add search for events in timeline (Krille Fear)
 - feat: Add waitForSync helper (Henri Carnot)
diff --git a/lib/src/room.dart b/lib/src/room.dart
index 2b1bbcb9..ebde0470 100644
--- a/lib/src/room.dart
+++ b/lib/src/room.dart
@@ -1416,6 +1416,12 @@ class Room {
         (summary.mJoinedMemberCount ?? 0) + (summary.mInvitedMemberCount ?? 0);
   }
 
+  @Deprecated(
+      "The method was renamed unsafeGetUserFromMemoryOrFallback. Please prefer requestParticipants.")
+  User getUserByMXIDSync(String mxID) {
+    return unsafeGetUserFromMemoryOrFallback(mxID);
+  }
+
   /// Returns the [User] object for the given [mxID] or return
   /// a fallback [User] and start a request to get the user
   /// from the homeserver.
diff --git a/pubspec.yaml b/pubspec.yaml
index 46a65911..2eab99a2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: matrix
 description: Matrix Dart SDK
-version: 0.9.8
+version: 0.9.9
 homepage: https://famedly.com
 repository: https://gitlab.com/famedly/company/frontend/famedlysdk.git