diff --git a/README.md b/README.md
index 46e6a6b..458e999 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ It enables the concatenation in a given context.
 
 **concat_types** `MIME types`
 
-**default:** `concat_types: text/css application/x-javascript`
+**default:** `concat_types: text/css application/javascript`
 
 **context:** `http, server, location`
 
diff --git a/ngx_http_concat_module.c b/ngx_http_concat_module.c
index 80e427c..78a862a 100644
--- a/ngx_http_concat_module.c
+++ b/ngx_http_concat_module.c
@@ -31,6 +31,8 @@ static char *ngx_http_concat_merge_loc_conf(ngx_conf_t *cf, void *parent,
 
 static ngx_str_t  ngx_http_concat_default_types[] = {
     ngx_string("application/x-javascript"),
+    ngx_string("application/javascript"),
+    ngx_string("text/javascript"),
     ngx_string("text/css"),
     ngx_null_string
 };