diff --git a/infrastructure/service/lemmyContentAggregatorService.ts b/infrastructure/service/lemmyContentAggregatorService.ts
index aaf0f46..bd49927 100644
--- a/infrastructure/service/lemmyContentAggregatorService.ts
+++ b/infrastructure/service/lemmyContentAggregatorService.ts
@@ -1,21 +1,43 @@
 import Post from "../../domain/service/contentAggregatorService/post";
 import ContentAggregatorService from "../../domain/service/contentAggregatorService/contentAggregatorService";
 
+interface LemmyPostAuthor {
+  display_name: string;
+  name: string;
+}
+
+interface LemmyPostData {
+  featured_community: boolean;
+  featured_local: boolean;
+  name: string;
+  ap_id: string;
+  body: string;
+  published: string;
+}
+
+interface LemmyPost {
+  creator: LemmyPostAuthor;
+  post: LemmyPostData;
+}
+
+interface LemmyApiResponse {
+  posts: LemmyPost[];
+}
+
 export default class LemmyContentAggregatorService implements ContentAggregatorService {
   private feedUrl = "https://lemmy.pt/api/v3/post/list?community_name=devpt&limit=10&page=1&sort=New";
 
   async fetchLastPosts(): Promise<Post[]> {
-    let unpinnedPosts = [];
+    let unpinnedPosts: Post[] = [];
 
     try {
       const response = await fetch(this.feedUrl);
-
-      const data = await response.json();
+      const data: LemmyApiResponse = await response.json();
 
       unpinnedPosts = data.posts
-        .filter((item: any) => !item.post.featured_community && !item.post.featured_local)
+        .filter((item: LemmyPost) => !item.post.featured_community && !item.post.featured_local)
         .map(
-          (item: any) =>
+          (item: LemmyPost) =>
             new Post({
               authorName: item.creator.display_name || item.creator.name,
               title: item.post.name,