diff --git a/src/utils/getPostsByTag.ts b/src/utils/getPostsByTag.ts
index 82ccda3..ed59eed 100644
--- a/src/utils/getPostsByTag.ts
+++ b/src/utils/getPostsByTag.ts
@@ -1,8 +1,7 @@
 import { slufigyAll } from "./slugify";
-import type { MarkdownInstance } from "astro";
-import type { Frontmatter } from "../types";
+import type { CollectionEntry } from "astro:content";
 
-const getPostsByTag = (posts: MarkdownInstance<Frontmatter>[], tag: string) =>
-  posts.filter(post => slufigyAll(post.frontmatter.tags).includes(tag));
+const getPostsByTag = (posts: CollectionEntry<"blog">[], tag: string) =>
+  posts.filter(post => slufigyAll(post.data.tags).includes(tag));
 
 export default getPostsByTag;
diff --git a/src/utils/getSortedPosts.ts b/src/utils/getSortedPosts.ts
index f14d963..5c6b7ba 100644
--- a/src/utils/getSortedPosts.ts
+++ b/src/utils/getSortedPosts.ts
@@ -5,8 +5,8 @@ const getSortedPosts = (posts: CollectionEntry<"blog">[]) =>
     .filter(({ data }) => !data.draft)
     .sort(
       (a, b) =>
-        Math.floor(new Date(b.data.publishDatetime).getTime() / 1000) -
-        Math.floor(new Date(a.data.publishDatetime).getTime() / 1000)
+        Math.floor(new Date(b.data.pubDatetime).getTime() / 1000) -
+        Math.floor(new Date(a.data.pubDatetime).getTime() / 1000)
     );
 
 export default getSortedPosts;
diff --git a/src/utils/getUniqueTags.ts b/src/utils/getUniqueTags.ts
index 343263b..57a82ed 100644
--- a/src/utils/getUniqueTags.ts
+++ b/src/utils/getUniqueTags.ts
@@ -1,12 +1,11 @@
 import { slugifyStr } from "./slugify";
-import type { MarkdownInstance } from "astro";
-import type { Frontmatter } from "../types";
+import type { CollectionEntry } from "astro:content";
 
-const getUniqueTags = (posts: MarkdownInstance<Frontmatter>[]) => {
+const getUniqueTags = (posts: CollectionEntry<"blog">[]) => {
   let tags: string[] = [];
-  const filteredPosts = posts.filter(({ frontmatter }) => !frontmatter.draft);
+  const filteredPosts = posts.filter(({ data }) => !data.draft);
   filteredPosts.forEach(post => {
-    tags = [...tags, ...post.frontmatter.tags]
+    tags = [...tags, ...post.data.tags]
       .map(tag => slugifyStr(tag))
       .filter(
         (value: string, index: number, self: string[]) =>
diff --git a/src/utils/slugify.ts b/src/utils/slugify.ts
index 3a04e5f..55b726b 100644
--- a/src/utils/slugify.ts
+++ b/src/utils/slugify.ts
@@ -1,10 +1,10 @@
-import type { CollectionEntry } from "astro:content";
 import { slug as slugger } from "github-slugger";
+import type { BlogFrontmatter } from "@content/_schemas";
 
 export const slugifyStr = (str: string) => slugger(str);
 
-const slugify = (post: CollectionEntry<"blog">) =>
-  post.data.slug ? slugger(post.data.slug) : post.slug;
+const slugify = (post: BlogFrontmatter) =>
+  post.postSlug ? slugger(post.postSlug) : slugger(post.title);
 
 export const slufigyAll = (arr: string[]) => arr.map(str => slugifyStr(str));