diff --git a/trunk/3rdparty/openssl-OpenSSL_1_0_2u.tar.gz b/trunk/3rdparty/openssl-OpenSSL_1_0_2u.tar.gz
new file mode 100644
index 000000000..32af33690
Binary files /dev/null and b/trunk/3rdparty/openssl-OpenSSL_1_0_2u.tar.gz differ
diff --git a/trunk/3rdparty/readme.txt b/trunk/3rdparty/readme.txt
index ca54471f2..1f7d99a9a 100644
--- a/trunk/3rdparty/readme.txt
+++ b/trunk/3rdparty/readme.txt
@@ -8,7 +8,9 @@ st-1.9.zip
     basic framework for srs.
     
 openssl-1.1.0e.zip
+openssl-OpenSSL_1_0_2u.tar.gz
     openssl for SRS(with-ssl) RTMP complex handshake to delivery h264+aac stream.
+    SRTP depends on openssl 1.0.*, so we use both ssl versions.
 
 CherryPy-3.2.4.zip
     sample api server for srs.