diff --git a/README.md b/README.md
index f060de93e..09002a913 100644
--- a/README.md
+++ b/README.md
@@ -856,7 +856,7 @@ nlp.extend({
 ##### Comparisons
 
 - [Compromise and Spacy](https://observablehq.com/@spencermountain/compromise-and-spacy)
-- [Compromise and NLTK](https://observablehq.com/@spencermountain/compromise-and-NLTK)
+- [Compromise and NLTK](https://observablehq.com/@spencermountain/compromise-and-nltk)
 
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