diff --git a/src/subcommand/server.rs b/src/subcommand/server.rs
index 8b1b1476b8..59d46286cf 100644
--- a/src/subcommand/server.rs
+++ b/src/subcommand/server.rs
@@ -815,9 +815,8 @@ impl Server {
       header::CONTENT_TYPE,
       inscription
         .content_type()
-        .unwrap_or("application/octet-stream")
-        .parse()
-        .unwrap(),
+        .and_then(|content_type| content_type.parse().ok())
+        .unwrap_or(HeaderValue::from_static("application/octet-stream")),
     );
     headers.insert(
       header::CONTENT_SECURITY_POLICY,
@@ -2201,6 +2200,18 @@ mod tests {
     assert!(body.is_empty());
   }
 
+  #[test]
+  fn content_response_bad_content_type() {
+    let (headers, body) = Server::content_response(Inscription::new(
+      Some("\n".as_bytes().to_vec()),
+      Some(Vec::new()),
+    ))
+    .unwrap();
+
+    assert_eq!(headers["content-type"], "application/octet-stream");
+    assert!(body.is_empty());
+  }
+
   #[test]
   fn text_preview() {
     let server = TestServer::new_with_regtest();