diff --git a/html/post.html b/html/post.html
index c2fa751..1184ed0 100644
--- a/html/post.html
+++ b/html/post.html
@@ -1,4 +1,4 @@
-<div class="post">
+<div class="post" id="<!--id-->">
 <h2><!--title--></h2>
 <time title="<!--timestamp-->"><!--date--></time>
 <a href="<!--link-->">Link</a>
@@ -11,4 +11,5 @@
 <div class="preview">
     <!--preview-->
 </div>
-</div>
\ No newline at end of file
+
+<!--postend--></div>
\ No newline at end of file
diff --git a/save.py b/save.py
index 3b26635..16cc8c1 100755
--- a/save.py
+++ b/save.py
@@ -2,6 +2,7 @@
 
 import argparse
 import os
+import re
 from tqdm import tqdm
 from utilities import *
 
@@ -32,24 +33,35 @@ else:
 if not os.path.exists(os.path.join(location, "media")):
     os.mkdir(os.path.join(location, "media"))
 
-posts_html = []
+# Are there any posts already?
+post_ids, posts_html = [], []
+if os.path.exists(os.path.join(location, html_file)):
+    with open(os.path.join(location, html_file)) as f:
+        current_html = f.read()
+        post_ids = re.findall(r'id="(.+?)"', current_html)
+        posts_html = re.findall(
+            r'(<div class="post"[\S\n\t\v ]+?<!--postend--><\/div>)',
+            current_html
+        )
 
-posts = get_posts(client)
-for post in tqdm(posts):
-    post_html = get_post_html(post)
-    media = save_media(post, location)
-    if media:
-        post_html = add_media_preview_to_html(post_html, media)
-    posts_html.append(post_html)
+# Get posts HTML
+posts = [p for p in get_posts(client) if p.id not in post_ids]
+if not posts:
+    print("No new saved posts")
+else:
+    for post in tqdm(posts):
+        post_html = get_post_html(post)
+        media = save_media(post, location)
+        if media:
+            post_html = add_media_preview_to_html(post_html, media)
+        posts_html.append(post_html)
 
+# Save HTML
 with open(os.path.join("html", html_file)) as f:
     html = f.read()
-
 with open(os.path.join("html", "style.css")) as f:
     html = html.replace("<style></style>", f"<style>\n{f.read()}\n</style>")
-
 html = html.replace("<!--posts-->", "\n".join(posts_html))
-
 with open(os.path.join(location, html_file), "w") as f:
     f.write(html)
 
diff --git a/utilities.py b/utilities.py
index cebe547..22952b8 100644
--- a/utilities.py
+++ b/utilities.py
@@ -8,7 +8,7 @@ from datetime import datetime
 from secrets import REDDIT_USERNAME, REDDIT_PASSWORD
 from secrets import REDDIT_CLIENT_ID, REDDIT_SECRET
 
-IMAGE_EXTENSIONS = ["jpg", "jpeg", "png", "gif", "gifv"]
+IMAGE_EXTENSIONS = ["gif", "gifv", "jpg", "jpeg", "png"]
 VIDEO_EXTENSIONS = ["mp4"]
 PLATFORMS = ["redgifs.com", "gfycat.com", "imgur.com", "youtube.com"]
 
@@ -38,7 +38,7 @@ def get_upvoted_posts(client):
 
     return [
         upvoted for upvoted in client.user.me().upvoted(limit=None)
-        if saved.__class__.__name__ == "Submission"
+        if upvoted.__class__.__name__ == "Submission"
     ]
 
 
@@ -54,6 +54,7 @@ def get_post_html(post):
     html = html.replace("<!--user-->", f"/u/{post.author.name}" if post.author else "[deleted]")
     html = html.replace("<!--link-->", f"https://reddit.com{post.permalink}")
     html = html.replace("<!--content-link-->", post.url)
+    html = html.replace("<!--id-->", post.id)
     html = html.replace("<!--body-->", post.selftext_html or "")
     html = html.replace("<!--timestamp-->", str(dt))
     html = html.replace("<!--date-->", dt.strftime("%d %B, %Y"))