diff --git a/68.md b/68.md
index 22509e0..dcc56f1 100644
--- a/68.md
+++ b/68.md
@@ -58,6 +58,9 @@ They may contain multiple images to be displayed as a single post.
     ["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>"],
     ["p", "<32-bytes hex of a pubkey>", "<optional recommended relay URL>"],
 
+    // Specify the media type for filters to allow clients to filter by supported kinds
+    ["m", "image/jpeg"]
+
     // Hashtags
     ["t", "<tag>"],
     ["t", "<tag>"],
@@ -67,4 +70,12 @@ They may contain multiple images to be displayed as a single post.
 
 The `imeta` tag `annotate-user` places a user link in the specific position in the image.
 
+Only the following media types are accepted: 
+- `image/apng`: Animated Portable Network Graphics (APNG)
+- `image/avif`: AV1 Image File Format (AVIF)
+- `image/gif`: Graphics Interchange Format (GIF)
+- `image/jpeg`: Joint Photographic Expert Group image (JPEG)
+- `image/png`: Portable Network Graphics (PNG)
+- `image/webp`: Web Picture format (WEBP)
+
 Picture events might be used with [NIP-71](71.md)'s kind `34236` to display short vertical videos in the same feed.
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