diff --git a/index.js b/index.js
index 3e9cdb7..e212558 100644
--- a/index.js
+++ b/index.js
@@ -104,6 +104,11 @@ const parseString = (() => {
             return null;
           }
 
+          // Accommodate numbers as values.
+          if (matches.length === 1 && str.startsWith('{{') && str.endsWith('}}')) {
+            return value;
+          }
+
           return str.replace(match, value);
         }, str);
       };