diff --git a/How-to-use-lexicon-dns-api.md b/How-to-use-lexicon-dns-api.md
index eb54ae1..99c0385 100644
--- a/How-to-use-lexicon-dns-api.md
+++ b/How-to-use-lexicon-dns-api.md
@@ -1,4 +1,4 @@
-## lexicon is a python tool for a number dns providers.
+## lexicon is a python tool for a number of dns providers.
 
 As I'm writing this doc, it supports the following dns api:
 The current supported providers are: