diff --git a/src/internal_modules/roc_rtcp/reporter.cpp b/src/internal_modules/roc_rtcp/reporter.cpp
index 72aea1c88..644681079 100644
--- a/src/internal_modules/roc_rtcp/reporter.cpp
+++ b/src/internal_modules/roc_rtcp/reporter.cpp
@@ -1401,7 +1401,7 @@ Reporter::find_stream_(packet::stream_source_t source_id, CreateMode mode) {
                 (unsigned long)source_id);
 
         stream =
-                new(stream_pool_) Stream(stream_pool_, source_id, report_time_, config_.rtt, dumper_);
+                new(stream_pool_) Stream(arena_, stream_pool_, source_id, report_time_, config_.rtt, dumper_);
         if (!stream) {
             report_error_ = status::StatusNoMem;
             return NULL;
diff --git a/src/internal_modules/roc_rtcp/reporter.h b/src/internal_modules/roc_rtcp/reporter.h
index 8022a50ec..8ea7b7cfe 100644
--- a/src/internal_modules/roc_rtcp/reporter.h
+++ b/src/internal_modules/roc_rtcp/reporter.h
@@ -262,14 +262,15 @@ class Reporter : public core::NonCopyable<> {
     struct Stream : core::RefCounted<Stream, core::PoolAllocation>,
                     core::HashmapNode<>,
                     core::ListNode<> {
-        Stream(core::IPool &pool, packet::stream_source_t source_id, core::nanoseconds_t report_time,
+        Stream(core::IArena &arena, core::IPool &pool, packet::stream_source_t source_id,
+               core::nanoseconds_t report_time,
                const RttConfig &rtt_config, dbgio::CsvDumper *dumper)
             : core::RefCounted<Stream, core::PoolAllocation>(pool)
             , source_id(source_id)
             , has_remote_recv_report(false)
-            , remote_recv_rtt(rtt_config, dumper)
+            , remote_recv_rtt(arena, rtt_config, dumper)
             , has_remote_send_report(false)
-            , remote_send_rtt(rtt_config, dumper)
+            , remote_send_rtt(arena, rtt_config, dumper)
             , local_recv_report(NULL)
             , last_update(report_time)
             , last_local_sr(0)
diff --git a/src/internal_modules/roc_rtcp/rtt_estimator.cpp b/src/internal_modules/roc_rtcp/rtt_estimator.cpp
index f93401407..32cf4fdae 100644
--- a/src/internal_modules/roc_rtcp/rtt_estimator.cpp
+++ b/src/internal_modules/roc_rtcp/rtt_estimator.cpp
@@ -12,13 +12,14 @@
 namespace roc {
 namespace rtcp {
 
-RttEstimator::RttEstimator(const RttConfig &config, dbgio::CsvDumper *dumper)
+RttEstimator::RttEstimator(core::IArena &arena, const RttConfig &config, dbgio::CsvDumper *dumper)
     : config_(config)
     , metrics_()
     , has_metrics_(false)
     , first_report_ts_(0)
     , last_report_ts_(0)
-    , dumper_(dumper) {
+    , dumper_(dumper)
+    , rtt_stats_(arena, 100){
 }
 
 bool RttEstimator::has_metrics() const {
@@ -86,8 +87,14 @@ void RttEstimator::update(core::nanoseconds_t local_report_ts,
     }
     last_report_ts_ = local_report_ts;
 
-    metrics_.clock_offset = clock_offset;
-    metrics_.rtt = rtt;
+    RttOffsetPair p;
+    p.rtt = rtt;
+    p.offset = clock_offset;
+    rtt_stats_.add(p);
+    RttOffsetPair min = rtt_stats_.mov_min();
+
+    metrics_.clock_offset = min.offset;
+    metrics_.rtt = min.rtt;
 
     has_metrics_ = true;
 
diff --git a/src/internal_modules/roc_rtcp/rtt_estimator.h b/src/internal_modules/roc_rtcp/rtt_estimator.h
index bcb3aa756..3844e7aa1 100644
--- a/src/internal_modules/roc_rtcp/rtt_estimator.h
+++ b/src/internal_modules/roc_rtcp/rtt_estimator.h
@@ -15,6 +15,7 @@
 #include "roc_core/time.h"
 #include "roc_packet/units.h"
 #include "roc_dbgio/csv_dumper.h"
+#include "roc_stat/mov_aggregate.h"
 
 namespace roc {
 namespace rtcp {
@@ -52,7 +53,7 @@ struct RttMetrics {
 class RttEstimator {
 public:
     //! Initialize.
-    RttEstimator(const RttConfig &config, dbgio::CsvDumper *dumper);
+    RttEstimator(core::IArena &arena, const RttConfig &config, dbgio::CsvDumper *dumper);
 
     //! Check whether metrics are already available.
     bool has_metrics() const;
@@ -83,6 +84,26 @@ class RttEstimator {
 
     dbgio::CsvDumper *dumper_;
 
+    struct RttOffsetPair {
+        core::nanoseconds_t rtt;
+        core::nanoseconds_t offset;
+
+        RttOffsetPair() {
+            rtt = 10e9;
+        }
+
+        RttOffsetPair(const int64_t &r) {
+            rtt = r;
+            offset = 0;
+        }
+
+        operator int64_t() const {
+            return rtt;
+        }
+    };
+
+    stat::MovAggregate<RttOffsetPair> rtt_stats_;
+
 };
 
 } // namespace rtcp