diff --git a/MANUAL.txt b/MANUAL.txt
index 1df5af2a4..8288d0218 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -2866,7 +2866,7 @@ pandoc](#slide-shows).
 
 `revealjs-url`
 :   base URL for reveal.js documents (defaults to
-    `https://unpkg.com/reveal.js@^4/`)
+    `https://unpkg.com/reveal.js@^4`)
 
 `s5-url`
 :   base URL for S5 documents (defaults to `s5/default`)