diff --git a/Gemfile.lock b/Gemfile.lock
index d531aee81..d3dc824f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -275,7 +275,7 @@ GEM
       concurrent-ruby (~> 1.0)
     uber (0.1.0)
     unicode-display_width (2.5.0)
-    webrick (1.8.1)
+    webrick (1.9.0)
     word_wrap (1.0.0)
     xcode-install (2.8.1)
       claide (>= 0.9.1)
diff --git a/MatrixSDK/MXRestClient.m b/MatrixSDK/MXRestClient.m
index 2691d211f..c92cc7ce5 100644
--- a/MatrixSDK/MXRestClient.m
+++ b/MatrixSDK/MXRestClient.m
@@ -3103,7 +3103,7 @@ -(MXHTTPOperation *)reportRoom:(NSString *)roomId
                        success:(void (^)(void))success
                        failure:(void (^)(NSError *))failure
 {
-    NSString *path = [NSString stringWithFormat:@"%@/org.matrix.msc4151/rooms/%@/report", kMXAPIPrefixPathUnstable, roomId];
+    NSString *path = [NSString stringWithFormat:@"%@/rooms/%@/report", kMXAPIPrefixPathV3, roomId];
 
     NSDictionary *parameters = @{ @"reason": reason.length > 0 ? reason : @"" };