diff --git a/README.md b/README.md
index 2f5299b09..2a0ce6261 100755
--- a/README.md
+++ b/README.md
@@ -214,6 +214,8 @@ Please select your language:
 
 ### V2 changes
 
+* v2.0, 2017-04-15, Merge [#846][bug #846], fix fd leak for FLV stream caster. 2.0.237
+* v2.0, 2017-04-15, Merge [#841][bug #841], avoid the duplicated sps/pps in ts. 2.0.236
 * v2.0, 2017-04-09, Fix [#834][bug #834], crash for TS context corrupt. 2.0.235
 * <strong>v2.0, 2017-03-03, [2.0 release0(2.0.234)][r2.0r0] released. 86373 lines.</strong>
 * v2.0, 2017-02-25, for [#730][bug #730], remove the test code. 2.0.234
@@ -1387,6 +1389,8 @@ Winlin
 [bug #752]: https://github.com/ossrs/srs/issues/752
 [bug #503]: https://github.com/ossrs/srs/issues/503
 [bug #834]: https://github.com/ossrs/srs/issues/834
+[bug #841]: https://github.com/ossrs/srs/issues/841
+[bug #846]: https://github.com/ossrs/srs/issues/846
 [bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx
 
 [bug #735]: https://github.com/ossrs/srs/issues/735
diff --git a/trunk/src/app/srs_app_caster_flv.cpp b/trunk/src/app/srs_app_caster_flv.cpp
index edd57a939..601baf106 100644
--- a/trunk/src/app/srs_app_caster_flv.cpp
+++ b/trunk/src/app/srs_app_caster_flv.cpp
@@ -91,6 +91,11 @@ void SrsAppCasterFlv::remove(ISrsConnection* c)
     if ((it = std::find(conns.begin(), conns.end(), conn)) != conns.end()) {
         conns.erase(it);
     }
+    
+    // fixbug: SrsHttpConn for CasterFlv is not freed, which could cause memory leak
+    // so, free conn which is not managed by SrsServer->conns;
+    // @see: https://github.com/ossrs/srs/issues/826
+    srs_freep(c);
 }
 
 int SrsAppCasterFlv::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
diff --git a/trunk/src/kernel/srs_kernel_ts.cpp b/trunk/src/kernel/srs_kernel_ts.cpp
index 3f732c039..2598067dd 100644
--- a/trunk/src/kernel/srs_kernel_ts.cpp
+++ b/trunk/src/kernel/srs_kernel_ts.cpp
@@ -3048,6 +3048,8 @@ int SrsTsMessageCache::do_cache_avc(SrsVideoFrame* frame)
     SrsVideoCodecConfig* codec = frame->vcodec();
     srs_assert(codec);
     
+    bool is_sps_pps_appended = false;
+    
     // all sample use cont nalu header, except the sps-pps before IDR frame.
     for (int i = 0; i < frame->nb_samples; i++) {
         SrsSample* sample = &frame->samples[i];
@@ -3065,7 +3067,7 @@ int SrsTsMessageCache::do_cache_avc(SrsVideoFrame* frame)
         
         // Insert sps/pps before IDR when there is no sps/pps in samples.
         // The sps/pps is parsed from sequence header(generally the first flv packet).
-        if (nal_unit_type == SrsAvcNaluTypeIDR && !frame->has_sps_pps) {
+        if (nal_unit_type == SrsAvcNaluTypeIDR && !frame->has_sps_pps && !is_sps_pps_appended) {
             if (codec->sequenceParameterSetLength > 0) {
                 srs_avc_insert_aud(video->payload, aud_inserted);
                 video->payload->append(codec->sequenceParameterSetNALUnit, codec->sequenceParameterSetLength);
@@ -3074,6 +3076,7 @@ int SrsTsMessageCache::do_cache_avc(SrsVideoFrame* frame)
                 srs_avc_insert_aud(video->payload, aud_inserted);
                 video->payload->append(codec->pictureParameterSetNALUnit, codec->pictureParameterSetLength);
             }
+            is_sps_pps_appended = true;
         }
         
         // Insert the NALU to video in annexb.