diff --git a/docs/buy.md b/docs/buy.md
index 28d155a..49ccb26 100644
--- a/docs/buy.md
+++ b/docs/buy.md
@@ -2,6 +2,6 @@
 
 > [:icon-desktop-download: **Buy on the Mac App Store**](https://apps.apple.com/us/app/recall-toolbox/id6448816971)
 
-**Recall Toolbox** is a one-time payment of **USD29.99**.
+**Recall Toolbox** is a one-time payment of **USD$29.99**.
 
 You can find information about Educational Pricing [here](/educational/).
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