diff --git a/packages/netlify-cms-core/src/backend.js b/packages/netlify-cms-core/src/backend.js
index 43a9f444..a2906785 100644
--- a/packages/netlify-cms-core/src/backend.js
+++ b/packages/netlify-cms-core/src/backend.js
@@ -69,6 +69,9 @@ const slugFormatter = (collection, entryData, slugConfig) => {
     // Convert slug to lower-case
     .toLocaleLowerCase()
 
+    // Remove single quotes.
+    .replace(/[']/g, '')
+
     // Replace periods with dashes.
     .replace(/[.]/g, '-');