diff --git a/README.md b/README.md
index eb94ca94..1c40f975 100644
--- a/README.md
+++ b/README.md
@@ -93,9 +93,9 @@ HTTP Status codes are quite straight forward. For some code examples [you can lo
 
 [![Daily HTTP method spec update](https://github.com/PrinsFrank/standards/actions/workflows/update-spec-http-methods.yml/badge.svg)](https://github.com/PrinsFrank/standards/actions/workflows/update-spec-http-methods.yml)
 
-| Key              | Value            |
-|------------------|------------------|
-| POST             | POST             |
-| PUT              | PUT              |
-| BASELINE_CONTROL | BASELINE-CONTROL |
-| ...              | ...              |
+| Key             | Value            |
+|-----------------|------------------|
+| Post            | POST             |
+| Put             | PUT              |
+| BaselineControl | BASELINE-CONTROL |
+| ...             | ...              |
diff --git a/dev/DataSource/Http/HttpMethodSource.php b/dev/DataSource/Http/HttpMethodSource.php
index 66522975..7d60699b 100644
--- a/dev/DataSource/Http/HttpMethodSource.php
+++ b/dev/DataSource/Http/HttpMethodSource.php
@@ -16,7 +16,13 @@ public static function transformName(string $key): ?string
             return null; // According to https://www.rfc-editor.org/rfc/rfc9110.html#name-method-registration, section 18.2, this is a reserved method
         }
 
-        return $key;
+        return preg_replace_callback(
+            '/_([a-z])/',
+            static function ($matches) {
+                return mb_convert_case($matches[1], MB_CASE_UPPER);
+            },
+            ucfirst(strtolower($key))
+        );
     }
 
     public static function transformValue(string $value): string|int|null
diff --git a/src/Http/HttpMethod.php b/src/Http/HttpMethod.php
index 685ae5e8..09461235 100644
--- a/src/Http/HttpMethod.php
+++ b/src/Http/HttpMethod.php
@@ -8,43 +8,43 @@
  */
 enum HttpMethod: string
 {
-    case ACL               = 'ACL';
-    case BASELINE_CONTROL  = 'BASELINE-CONTROL';
-    case BIND              = 'BIND';
-    case CHECKIN           = 'CHECKIN';
-    case CHECKOUT          = 'CHECKOUT';
-    case CONNECT           = 'CONNECT';
-    case COPY              = 'COPY';
-    case DELETE            = 'DELETE';
-    case GET               = 'GET';
-    case HEAD              = 'HEAD';
-    case LABEL             = 'LABEL';
-    case LINK              = 'LINK';
-    case LOCK              = 'LOCK';
-    case MERGE             = 'MERGE';
-    case MKACTIVITY        = 'MKACTIVITY';
-    case MKCALENDAR        = 'MKCALENDAR';
-    case MKCOL             = 'MKCOL';
-    case MKREDIRECTREF     = 'MKREDIRECTREF';
-    case MKWORKSPACE       = 'MKWORKSPACE';
-    case MOVE              = 'MOVE';
-    case OPTIONS           = 'OPTIONS';
-    case ORDERPATCH        = 'ORDERPATCH';
-    case PATCH             = 'PATCH';
-    case POST              = 'POST';
-    case PRI               = 'PRI';
-    case PROPFIND          = 'PROPFIND';
-    case PROPPATCH         = 'PROPPATCH';
-    case PUT               = 'PUT';
-    case REBIND            = 'REBIND';
-    case REPORT            = 'REPORT';
-    case SEARCH            = 'SEARCH';
-    case TRACE             = 'TRACE';
-    case UNBIND            = 'UNBIND';
-    case UNCHECKOUT        = 'UNCHECKOUT';
-    case UNLINK            = 'UNLINK';
-    case UNLOCK            = 'UNLOCK';
-    case UPDATE            = 'UPDATE';
-    case UPDATEREDIRECTREF = 'UPDATEREDIRECTREF';
-    case VERSION_CONTROL   = 'VERSION-CONTROL';
+    case Acl               = 'ACL';
+    case BaselineControl   = 'BASELINE-CONTROL';
+    case Bind              = 'BIND';
+    case Checkin           = 'CHECKIN';
+    case Checkout          = 'CHECKOUT';
+    case Connect           = 'CONNECT';
+    case Copy              = 'COPY';
+    case Delete            = 'DELETE';
+    case Get               = 'GET';
+    case Head              = 'HEAD';
+    case Label             = 'LABEL';
+    case Link              = 'LINK';
+    case Lock              = 'LOCK';
+    case Merge             = 'MERGE';
+    case Mkactivity        = 'MKACTIVITY';
+    case Mkcalendar        = 'MKCALENDAR';
+    case Mkcol             = 'MKCOL';
+    case Mkredirectref     = 'MKREDIRECTREF';
+    case Mkworkspace       = 'MKWORKSPACE';
+    case Move              = 'MOVE';
+    case Options           = 'OPTIONS';
+    case Orderpatch        = 'ORDERPATCH';
+    case Patch             = 'PATCH';
+    case Post              = 'POST';
+    case Pri               = 'PRI';
+    case Propfind          = 'PROPFIND';
+    case Proppatch         = 'PROPPATCH';
+    case Put               = 'PUT';
+    case Rebind            = 'REBIND';
+    case Report            = 'REPORT';
+    case Search            = 'SEARCH';
+    case Trace             = 'TRACE';
+    case Unbind            = 'UNBIND';
+    case Uncheckout        = 'UNCHECKOUT';
+    case Unlink            = 'UNLINK';
+    case Unlock            = 'UNLOCK';
+    case Update            = 'UPDATE';
+    case Updateredirectref = 'UPDATEREDIRECTREF';
+    case VersionControl    = 'VERSION-CONTROL';
 }