diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 11c121e..1408d3b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -213,7 +213,7 @@
         <item>- osmdroid: https://github.com/osmdroid/osmdroid</item>
         <item>- osmbonuspack: https://github.com/MKergall/osmbonuspack/</item>
         <item>- icons8: https://icons8.com/</item>
-        <item>- GraphView: https://github.com/jjoe64/GraphView</item>
+        <item>- WilliamChart: https://github.com/diogobernardino/WilliamChart</item>
     </string-array>
     <string-array name="fountain_size_dialog_options">
         <item>Small</item>