diff --git a/src/oauth2server/Server.php b/src/oauth2server/Server.php
index 20931995..415d5cb8 100644
--- a/src/oauth2server/Server.php
+++ b/src/oauth2server/Server.php
@@ -20,7 +20,7 @@ IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-namespace OAuth2;
+namespace oauth2server;
 
 class OAuthServerClientException extends \Exception {}