diff --git a/src/ssl_key_handler.cpp b/src/ssl_key_handler.cpp
index b2a78b8..cc11360 100644
--- a/src/ssl_key_handler.cpp
+++ b/src/ssl_key_handler.cpp
@@ -503,7 +503,7 @@
         boost::system::error_code ec;
 
         boost::asio::const_buffer buf(sslPemFile.data(), sslPemFile.size());
-        mSslContext.use_certificate(buf, boost::asio::ssl::context::pem, ec);
+        mSslContext.use_certificate_chain(buf, ec);
         if (ec)
         {
             return false;