diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b5df46..889d553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## 3.2.2 under development
 
+- Bug #116: Fix authentication scheme in `HttpBearer` challenge according to RFC 6750 (@samdark)
 - Chg #104: Bump minimal PHP version to 8.1 (@vjik)
 - Enh #104: Explicitly mark readonly properties (@vjik)
 - Enh #105: Explicitly import classes and functions in "use" section (@mspirkov)
diff --git a/src/Method/HttpBearer.php b/src/Method/HttpBearer.php
index e3f1487..dac3909 100644
--- a/src/Method/HttpBearer.php
+++ b/src/Method/HttpBearer.php
@@ -25,7 +25,7 @@ final class HttpBearer extends HttpHeader
 
     public function challenge(ResponseInterface $response): ResponseInterface
     {
-        return $response->withHeader(Header::WWW_AUTHENTICATE, "{$this->headerName} realm=\"{$this->realm}\"");
+        return $response->withHeader(Header::WWW_AUTHENTICATE, "Bearer realm=\"{$this->realm}\"");
     }
 
     /**
diff --git a/tests/Method/CompositeTest.php b/tests/Method/CompositeTest.php
index 3047343..4234262 100644
--- a/tests/Method/CompositeTest.php
+++ b/tests/Method/CompositeTest.php
@@ -103,7 +103,7 @@ public function testChallengeIsCorrect(): void
         ]));
 
         $this->assertEquals(
-            'Authorization realm="api"',
+            'Bearer realm="api"',
             $authenticationMethod
                 ->challenge($response)
                 ->getHeaderLine(Header::WWW_AUTHENTICATE),
diff --git a/tests/Method/HttpBearerTest.php b/tests/Method/HttpBearerTest.php
index cbab9a8..9d7c202 100644
--- a/tests/Method/HttpBearerTest.php
+++ b/tests/Method/HttpBearerTest.php
@@ -56,7 +56,7 @@ public function testChallengeIsCorrect(): void
         $authenticationMethod = new HttpBearer($identityRepository);
 
         $this->assertEquals(
-            'Authorization realm="api"',
+            'Bearer realm="api"',
             $authenticationMethod
                 ->challenge($response)
                 ->getHeaderLine(Header::WWW_AUTHENTICATE),
@@ -71,7 +71,7 @@ public function testCustomRealm(): void
             ->withRealm('gateway');
 
         $this->assertEquals(
-            'Authorization realm="gateway"',
+            'Bearer realm="gateway"',
             $authenticationMethod
                 ->challenge($response)
                 ->getHeaderLine(Header::WWW_AUTHENTICATE),