diff --git a/include/cinatra/http_parser.hpp b/include/cinatra/http_parser.hpp
index 79b3cc7a..04322cee 100644
--- a/include/cinatra/http_parser.hpp
+++ b/include/cinatra/http_parser.hpp
@@ -101,6 +101,9 @@ class http_parser {
     }
 
     full_url_ = url_;
+    if (!queries_.empty()) {
+      queries_.clear();
+    }
     if (has_query) {
       size_t pos = url_.find('?');
       parse_query(url_.substr(pos + 1, url_len - pos - 1));
diff --git a/include/cinatra/picohttpparser.h b/include/cinatra/picohttpparser.h
index 310044b3..d57377a5 100644
--- a/include/cinatra/picohttpparser.h
+++ b/include/cinatra/picohttpparser.h
@@ -884,7 +884,7 @@ static const char *parse_headers(const char *buf, const char *buf_end,
         // has connection
         has_connection = true;
         char ch = *value;
-        if (ch == 'U') {
+        if (ch == 'U' || ch == 'u') {
           // has upgrade
           has_upgrade = true;
         }