diff --git a/modules/http_proxy/http_proxy_js_request.go b/modules/http_proxy/http_proxy_js_request.go
index 76ed8f09..b4dc1d93 100644
--- a/modules/http_proxy/http_proxy_js_request.go
+++ b/modules/http_proxy/http_proxy_js_request.go
@@ -29,7 +29,7 @@ type JSRequest struct {
 	bodyRead bool
 }
 
-var header_regexp = regexp.MustCompile(`(.*?): (.*)`)
+var header_regexp = regexp.MustCompile(`^\s*(.*?)\s*:\s*(.*)\s*$`)
 
 func NewJSRequest(req *http.Request) *JSRequest {
 	headers := ""