diff --git a/Jerry.Utilities/LICENSE.txt b/Jerry.Utilities/LICENSE.txt
index 2a8aee8..de5c249 100644
--- a/Jerry.Utilities/LICENSE.txt
+++ b/Jerry.Utilities/LICENSE.txt
@@ -36,7 +36,7 @@ Portions of the Software are derived from the following sources, which are separ
    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.
 
-2. MathHelper
+2. OpenTK
 
    Copyright (c) 2006-2008 OpenTK Team
 
diff --git a/LICENSE b/LICENSE
index e86dcdb..fb1ce56 100644
--- a/LICENSE
+++ b/LICENSE
@@ -36,7 +36,7 @@ Portions of the Software are derived from the following sources, which are separ
    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.
 
-2. MathHelper
+2. OpenTK
 
    Copyright (c) 2006-2008 OpenTK Team