diff --git a/gatsby-node.js b/gatsby-node.js
index 607d2c7..cc4463e 100644
--- a/gatsby-node.js
+++ b/gatsby-node.js
@@ -36,8 +36,8 @@ exports.createPages = ({ graphql, boundActionCreators }) => {
         const posts = result.data.allMarkdownRemark.edges;
 
         _.each(posts, (post, index) => {
-          const previous = index === posts.length - 1 ? false : posts[index + 1].node;
-          const next = index === 0 ? false : posts[index - 1].node;
+          const previous = index === posts.length - 1 ? null : posts[index + 1].node;
+          const next = index === 0 ? null : posts[index - 1].node;
 
           createPage({
             path: post.node.fields.slug,