diff --git a/crates/node/ops/http2.rs b/crates/node/ops/http2.rs
index c0d49e39..f6d21ad0 100644
--- a/crates/node/ops/http2.rs
+++ b/crates/node/ops/http2.rs
@@ -238,7 +238,7 @@ pub async fn op_http2_send_response(
     }
     for (name, value) in headers {
         response.headers_mut().append(
-            HeaderName::from_lowercase(&name).unwrap(),
+            HeaderName::from_bytes(&name).unwrap(),
             HeaderValue::from_bytes(&value).unwrap(),
         );
     }
@@ -308,7 +308,7 @@ pub async fn op_http2_client_request(
 
     for (name, value) in headers {
         req.headers_mut().unwrap().append(
-            HeaderName::from_lowercase(&name).unwrap(),
+            HeaderName::from_bytes(&name).unwrap(),
             HeaderValue::from_bytes(&value).unwrap(),
         );
     }