diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 87766e99..6bacb24d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,5 +6,5 @@ rules:
 
 - Don't violate a providers TOS (if it exists, include a link to it)
 - Don't pre-populate api keys with working keys.
-- It should be a basic tile source, no exteral libraries etc.
-- The owner hasn't asked us to remove it (hasn't happened yet)
\ No newline at end of file
+- It should be a basic tile source, no external libraries etc.
+- The owner hasn't asked us to remove it (hasn't happened yet)