diff --git a/download_imgs.py b/download_imgs.py
index 5ba671a..a8af106 100644
--- a/download_imgs.py
+++ b/download_imgs.py
@@ -1,8 +1,9 @@
 import os
 from mwclient import Site
 from pprint import pprint
-from functions import update_json
 from PIL import Image
+from functions import update_json, remove_nonwords
+
 
 site = Site(host='hub.xpub.nl/sandbox', path='/itchwiki/')
 wd = os.path.dirname(os.path.abspath(__file__)) # working directory
@@ -28,7 +29,7 @@ for img in site.allimages():
     # important img info to dictionary
     img_dict = {
         'name': img.name,
-        'filename': img.page_title,
+        'filename': remove_nonwords(img.page_title),
         'timestamp': img.imageinfo['timestamp'],
         'url': img.imageinfo['url'],
         'urldesc': img.imageinfo['descriptionshorturl'],
@@ -37,6 +38,7 @@ for img in site.allimages():
 
     # location of image storage
     img_fn = os.path.join(imgdir, img_dict['filename'])
+    print(img_fn)
     # function updates images.json and returns whether the img needs to be downloaded or not
     download = update_json(imgsjson_fn, img_dict, img_fn)
 
@@ -47,16 +49,18 @@ for img in site.allimages():
             img.download(destination=img_file)
 
         # resize image
-        pilimg = Image.open(img_fn)
-        pilimg_dim = list(pilimg._size)
-        pilimg_dim_sort = sorted(pilimg_dim) # smallest dimension 1st
-        img_ratio = pilimg_dim_sort[0] / pilimg_dim_sort[1]
-        if pilimg_dim == pilimg_dim_sort:
-            # if height was largest
-            new_dim = [(thumbnail_size * img_ratio), thumbnail_size]
-        else:
-            # if with was largest
-            new_dim = [thumbnail_size,(thumbnail_size * img_ratio)]
-        pilimg.thumbnail(new_dim)
-        pilimg.save(img_fn)
+        fn, ext = os.path.splitext(img_fn)
+        if ext.lower() in ['.jpg', '.jpeg', '.gif', '.png']:  # only img format
+            pilimg = Image.open(img_fn)
+            pilimg_dim = list(pilimg._size)
+            pilimg_dim_sort = sorted(pilimg_dim) # smallest dimension 1st
+            img_ratio = pilimg_dim_sort[0] / pilimg_dim_sort[1]
+            if pilimg_dim == pilimg_dim_sort:
+                # if height was largest
+                new_dim = [(thumbnail_size * img_ratio), thumbnail_size]
+            else:
+                # if with was largest
+                new_dim = [thumbnail_size,(thumbnail_size * img_ratio)]
+            pilimg.thumbnail(new_dim)
+            pilimg.save(img_fn)
     print('\n')