diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e482ac..66e0898 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Version [0.3.0](https://github.com/sab-international/gitea.php/compare/v0.2.0...v0.3.0)
+- Breaking change: removed `__toString()` methods from the model classes.
+- Breaking change: using camelcase instead of all caps for constants.
+- Modified the package layout.
+- Updated the package dependencies.
+
 ## Version [0.2.0](https://github.com/sab-international/gitea.php/compare/v0.1.1...v0.2.0)
 - Added `__toString()` methods to the model classes.
 - Added the `TrackedTime` model.
diff --git a/src/models/StatusState.php b/src/models/StatusState.php
index 38d0c08..7a380fe 100644
--- a/src/models/StatusState.php
+++ b/src/models/StatusState.php
@@ -8,17 +8,17 @@ final class StatusState {
   use EnumTrait;
 
   /** @var string The status is an error. */
-  const ERROR = 'error';
+  const error = 'error';
 
   /** @var string The status is a failure. */
-  const FAILURE = 'failure';
+  const failure = 'failure';
 
   /** @var string The status is pending. */
-  const PENDING = 'pending';
+  const pending = 'pending';
 
   /** @var string The status is a success. */
-  const SUCCESS = 'success';
+  const success = 'success';
 
   /** @var string The status is a warning. */
-  const WARNING = 'warning';
+  const warning = 'warning';
 }
diff --git a/src/models/Team.php b/src/models/Team.php
index 52ef2a0..60b4adc 100644
--- a/src/models/Team.php
+++ b/src/models/Team.php
@@ -14,7 +14,7 @@ class Team implements \JsonSerializable {
   private $name;
 
   /** @var string The team permission. */
-  private $permission = TeamPermission::NONE;
+  private $permission = TeamPermission::none;
 
   /**
    * Creates a new team.
@@ -34,7 +34,7 @@ class Team implements \JsonSerializable {
   static function fromJson(object $map): self {
     return (new static(isset($map->id) && is_int($map->id) ? $map->id : -1, isset($map->name) && is_string($map->name) ? $map->name : ''))
       ->setDescription(isset($map->description) && is_string($map->description) ? $map->description : '')
-      ->setPermission(isset($map->permission) && is_string($map->permission) ? $map->permission : TeamPermission::NONE);
+      ->setPermission(isset($map->permission) && is_string($map->permission) ? $map->permission : TeamPermission::none);
   }
 
   /**
@@ -108,7 +108,7 @@ class Team implements \JsonSerializable {
    * @return $this This instance.
    */
   function setPermission(string $value): self {
-    $this->permission = TeamPermission::coerce($value, TeamPermission::NONE);
+    $this->permission = TeamPermission::coerce($value, TeamPermission::none);
     return $this;
   }
 }
diff --git a/src/models/TeamPermission.php b/src/models/TeamPermission.php
index 53c6a2a..504e765 100644
--- a/src/models/TeamPermission.php
+++ b/src/models/TeamPermission.php
@@ -8,17 +8,17 @@ final class TeamPermission {
   use EnumTrait;
 
   /** @var string The team has the administrator permission. */
-  const ADMIN = 'admin';
+  const admin = 'admin';
 
   /** @var string The team doesn't have any permission. */
-  const NONE = 'none';
+  const none = 'none';
 
   /** @var string The team has the owner permission. */
-  const OWNER = 'owner';
+  const owner = 'owner';
 
   /** @var string The team has the read permission. */
-  const READ = 'read';
+  const read = 'read';
 
   /** @var string The team has the write permission. */
-  const WRITE = 'write';
+  const write = 'write';
 }