diff --git a/Cargo.lock b/Cargo.lock
index 9ecf5b1..e0f470c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -588,6 +588,7 @@ dependencies = [
  "clap",
  "digest 0.11.0-rc.4",
  "env_logger",
+ "hex",
  "httpdate",
  "include_dir",
  "jwt-simple",
diff --git a/Cargo.toml b/Cargo.toml
index 01f67cf..c76180c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,3 +41,4 @@ lazy_static = "1.5.0"
 mailchecker = "6.0.19"
 httpdate = "1.0.3"
 build-time = "0.1.3"
+hex = "0.4.3"
diff --git a/src/controllers/assets_controller.rs b/src/controllers/assets_controller.rs
index d8544c7..2cc0a2e 100644
--- a/src/controllers/assets_controller.rs
+++ b/src/controllers/assets_controller.rs
@@ -22,7 +22,7 @@ pub async fn assets_route(req: HttpRequest, path: web::Path<String>) -> HttpResp
         None => HttpResponse::NotFound().body("404 Not found"),
         Some(file) => {
             let res = mime_guess::from_path(path).first_or_octet_stream();
-            let digest = format!("{:x?}", sha256(file.contents()));
+            let digest = hex::encode(sha256(file.contents()));
 
             // Check if the browser already knows the file by date
             if let Some(c) = req.headers().get(header::IF_MODIFIED_SINCE) {