diff --git a/src/controllers/api/streaming.ts b/src/controllers/api/streaming.ts
index 6a9e535..d7aa677 100644
--- a/src/controllers/api/streaming.ts
+++ b/src/controllers/api/streaming.ts
@@ -28,8 +28,8 @@ const streamSchema = z.enum([
 type Stream = z.infer<typeof streamSchema>;
 
 const streamingController: AppController = (c) => {
-  const upgrade = c.req.headers.get('upgrade');
-  const token = c.req.headers.get('sec-websocket-protocol');
+  const upgrade = c.req.header('upgrade');
+  const token = c.req.header('sec-websocket-protocol');
   const stream = streamSchema.optional().catch(undefined).parse(c.req.query('stream'));
 
   if (upgrade?.toLowerCase() !== 'websocket') {
diff --git a/src/controllers/nostr/relay.ts b/src/controllers/nostr/relay.ts
index 3a5a9aa..9f5cd59 100644
--- a/src/controllers/nostr/relay.ts
+++ b/src/controllers/nostr/relay.ts
@@ -117,7 +117,7 @@ function prepareFilters(filters: ClientREQ[2][]): Filter[] {
 }
 
 const relayController: AppController = (c) => {
-  const upgrade = c.req.headers.get('upgrade');
+  const upgrade = c.req.header('upgrade');
 
   if (upgrade?.toLowerCase() !== 'websocket') {
     return c.text('Please use a Nostr client to connect.', 400);
diff --git a/src/middleware/auth19.ts b/src/middleware/auth19.ts
index fec79ad..19344fb 100644
--- a/src/middleware/auth19.ts
+++ b/src/middleware/auth19.ts
@@ -6,7 +6,7 @@ const BEARER_REGEX = new RegExp(`^Bearer (${nip19.BECH32_REGEX.source})$`);
 
 /** NIP-19 auth middleware. */
 const auth19: AppMiddleware = async (c, next) => {
-  const authHeader = c.req.headers.get('authorization');
+  const authHeader = c.req.header('authorization');
   const match = authHeader?.match(BEARER_REGEX);
 
   if (match) {
diff --git a/src/sign.ts b/src/sign.ts
index b5bbd33..0662668 100644
--- a/src/sign.ts
+++ b/src/sign.ts
@@ -25,7 +25,7 @@ async function signEvent<K extends number = number>(
   opts: SignEventOpts = {},
 ): Promise<Event<K>> {
   const seckey = c.get('seckey');
-  const header = c.req.headers.get('x-nostr-sign');
+  const header = c.req.header('x-nostr-sign');
 
   if (seckey) {
     return finishEvent(event, seckey);