diff --git a/trunk/doc/CHANGELOG.md b/trunk/doc/CHANGELOG.md
index 8758eac2691..bc0622c25a3 100644
--- a/trunk/doc/CHANGELOG.md
+++ b/trunk/doc/CHANGELOG.md
@@ -7,6 +7,7 @@ The changelog for SRS.
 <a name="v5-changes"></a>
 
 ## SRS 5.0 Changelog
+* v5.0, 2023-09-07, Merge [#3795](https://github.com/ossrs/srs/pull/3795): Fix dash crash if format not supported. v5.0.177 (#3795)
 * v5.0, 2023-08-30, Merge [#3779](https://github.com/ossrs/srs/pull/3779): Support HTTP-API for fetching reload result. v5.0.176 (#3779)
 * v5.0, 2023-08-28, Merge [#3503](https://github.com/ossrs/srs/pull/3503): SrsContextId assignment can be improved without create a duplicated one. v5.0.175 (#3503)
 * v5.0, 2023-08-28, Merge [#3781](https://github.com/ossrs/srs/pull/3781): HLS: Fix on_hls and hls_dispose critical zone issue. v5.0.174 (#3781)
diff --git a/trunk/src/app/srs_app_dash.cpp b/trunk/src/app/srs_app_dash.cpp
index 7518c063ade..d2dd6c15537 100644
--- a/trunk/src/app/srs_app_dash.cpp
+++ b/trunk/src/app/srs_app_dash.cpp
@@ -619,7 +619,7 @@ srs_error_t SrsDashController::refresh_mpd(SrsFormat* format)
     srs_error_t err = srs_success;
     
     // TODO: FIXME: Support pure audio streaming.
-    if (!format->acodec || !format->vcodec) {
+    if (!format || !format->acodec || !format->vcodec) {
         return err;
     }
     
diff --git a/trunk/src/core/srs_core_version5.hpp b/trunk/src/core/srs_core_version5.hpp
index 7528834d629..78c2ca80e96 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    176
+#define VERSION_REVISION    177
 
 #endif