diff --git a/trunk/doc/CHANGELOG.md b/trunk/doc/CHANGELOG.md
index d9324665f..f00c4a512 100644
--- a/trunk/doc/CHANGELOG.md
+++ b/trunk/doc/CHANGELOG.md
@@ -7,6 +7,7 @@ The changelog for SRS.
 <a name="v6-changes"></a>
 
 ## SRS 6.0 Changelog
+* v6.0, 2025-03-20, Merge [#4305](https://github.com/ossrs/srs/pull/4305): free sample to prevent memory leak. v6.0.164 (#4305)
 * v6.0, 2025-03-18, Merge [#4302](https://github.com/ossrs/srs/pull/4302): update geekyeggo/delete-artifact to 5.0.0. v6.0.163 (#4302)
 * v6.0, 2025-03-06, Merge [#4296](https://github.com/ossrs/srs/pull/4296): Dvr: support h265 flv fragments. v6.0.162 (#4296)
 * v6.0, 2025-02-20, Merge [#4253](https://github.com/ossrs/srs/pull/4253): fix typo about heartbeat. v6.0.161 (#4253)
@@ -175,6 +176,7 @@ The changelog for SRS.
 <a name="v5-changes"></a>
 
 ## SRS 5.0 Changelog
+* v5.0, 2025-03-20, Merge [#4305](https://github.com/ossrs/srs/pull/4305): free sample to prevent memory leak. v5.0.222 (#4305)
 * v5.0, 2025-03-18, Merge [#4302](https://github.com/ossrs/srs/pull/4302): update geekyeggo/delete-artifact to 5.0.0. v5.0.221 (#4302)
 * v5.0, 2025-02-20, Merge [#4253](https://github.com/ossrs/srs/pull/4253): fix typo about heartbeat. v5.0.220 (#4253)
 * v5.0, 2025-02-19, Merge [#4291](https://github.com/ossrs/srs/pull/4291): fix ci error. v5.0.219 (#4291)
diff --git a/trunk/src/core/srs_core_version5.hpp b/trunk/src/core/srs_core_version5.hpp
index 87adb77fc..52c41ec2e 100644
--- a/trunk/src/core/srs_core_version5.hpp
+++ b/trunk/src/core/srs_core_version5.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       5
 #define VERSION_MINOR       0
-#define VERSION_REVISION    221
+#define VERSION_REVISION    222
 
 #endif
diff --git a/trunk/src/core/srs_core_version6.hpp b/trunk/src/core/srs_core_version6.hpp
index 5b12e3814..982dda3af 100644
--- a/trunk/src/core/srs_core_version6.hpp
+++ b/trunk/src/core/srs_core_version6.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       6
 #define VERSION_MINOR       0
-#define VERSION_REVISION    163
+#define VERSION_REVISION    164
 
 #endif
diff --git a/trunk/src/kernel/srs_kernel_rtc_rtp.cpp b/trunk/src/kernel/srs_kernel_rtc_rtp.cpp
index f5d597813..7b08532d9 100644
--- a/trunk/src/kernel/srs_kernel_rtc_rtp.cpp
+++ b/trunk/src/kernel/srs_kernel_rtc_rtp.cpp
@@ -1021,6 +1021,9 @@ ISrsRtpPayloader* SrsRtpRawPayload::copy()
 
     cp->payload = payload;
     cp->nn_payload = nn_payload;
+
+    // free sample to prevent memory leak.
+    srs_freep(cp->sample_);
     cp->sample_ = sample_->copy();
 
     return cp;