diff --git a/src/resolvers.js b/src/resolvers.js
index f2481dd..989a823 100644
--- a/src/resolvers.js
+++ b/src/resolvers.js
@@ -46,6 +46,9 @@ export default function WordExpressResolvers(Connectors, publicSettings) {
       },
       categories(post) {
         return Connectors.getPostTerms(post.id)
+      },
+      post_excerpt: function post_excerpt(post, { excerpt_length }) {
+        return post.post_excerpt || post.post_content.split(' ').slice(0, excerpt_length || 55).join(' ')
       }
     },
     Postmeta: {
diff --git a/src/schema/post.js b/src/schema/post.js
index ff5442f..03b4510 100644
--- a/src/schema/post.js
+++ b/src/schema/post.js
@@ -7,7 +7,7 @@ const Post = `
     id: Int
     post_title: String
     post_content: String
-    post_excerpt: String
+    post_excerpt(excerpt_length: Int): String
     post_status: String
     post_type: String
     post_name: String