diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 12ac133..45cd390 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,9 +3,9 @@
     <string name="app_name">Notes</string>
     
     <string-array name="sort_options">
-        <item>Most Recent</item>
-        <item>Oldest First</item>
-        <item>A to Z</item>
-        <item>Z to A</item>
+        <item>MOST_RECENT</item>
+        <item>OLDEST_FIRST</item>
+        <item>A_TO_Z</item>
+        <item>Z_TO_A</item>
     </string-array>
 </resources>