diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1082f9c..268b9c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.5.2
+### Bug fixes
+- Fixed number at the beginning of the slug
+
 ## 1.5.1
 ### Bug fixes
 - Remove HTML tag when handling slug
diff --git a/src/util.js b/src/util.js
index fd618aa..e4b67f9 100644
--- a/src/util.js
+++ b/src/util.js
@@ -120,6 +120,8 @@ export function slugify (string) {
     .replace(/<[^>\d]+>/g, '')
     .replace(re, '')
     .replace(/\s/g, replacement)
+    .replace(/-+/g, replacement)
+    .replace(/^(\d)/, '_$1')
   let occurrences = slugify.occurrences[slug]
 
   if (slugify.occurrences.hasOwnProperty(slug)) {