diff --git a/src/engines/postsearch/github.rs b/src/engines/postsearch/github.rs
index d631592..42b8de9 100644
--- a/src/engines/postsearch/github.rs
+++ b/src/engines/postsearch/github.rs
@@ -1,11 +1,11 @@
 use scraper::{Html, Selector};
 use url::Url;
 
-use crate::engines::{Response, CLIENT};
+use crate::engines::{answer::regex, Response, CLIENT};
 
 pub fn request(response: &Response) -> Option<reqwest::RequestBuilder> {
     for search_result in response.search_results.iter().take(8) {
-        if search_result.url.starts_with("https://github.com/") {
+        if regex!(r"^https:\/\/github\.com\/[\w-]+\/[\w.-]+$").is_match(&search_result.url) {
             return Some(CLIENT.get(search_result.url.as_str()));
         }
     }
@@ -43,6 +43,8 @@ pub fn parse_response(body: &str) -> Option<String> {
 
     let mut readme_html = ammonia::Builder::default()
         .link_rel(None)
+        .add_allowed_classes("div", &["markdown-alert"])
+        .add_allowed_classes("p", &["markdown-alert-title"])
         .url_relative(ammonia::UrlRelative::RewriteWithBase(
             Url::parse("https://github.com").unwrap(),
         ))
diff --git a/src/web/assets/style.css b/src/web/assets/style.css
index ad32d4c..a18532d 100644
--- a/src/web/assets/style.css
+++ b/src/web/assets/style.css
@@ -268,6 +268,13 @@ h1 {
   font-weight: normal;
   font-size: 0.8em;
 }
+.infobox-github-readme .markdown-alert {
+  padding-left: 0.5em;
+  border-left: 0.25em solid #234;
+}
+.infobox-github-readme .markdown-alert-title {
+  font-weight: bold;
+}
 .postsearch-infobox p {
   margin-bottom: 1em;
 }