diff --git a/.gitignore b/.gitignore
index a4dfdc7..23e8b09 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,5 @@ coverage/
 _site/
 dist/
 plugins-*/
+
+ipfs-core.min.js
diff --git a/src/chooser.js b/src/chooser.js
index 5f5139c..d338d5d 100644
--- a/src/chooser.js
+++ b/src/chooser.js
@@ -194,7 +194,7 @@ class Chooser extends LitElement
               <p class="control is-expanded">
                 <input class="file-name input" type="text"
                 name="filename" id="filename"
-                pattern="((file|http|https|ipfs|s3):\/\/.*\.(warc|warc.gz|zip|wacz|har|wbn|json))|(googledrive:\/\/.+)"
+                pattern="((file|http|https|ipfs|s3):\/\/.*\.(warc|warc.gz|zip|wacz|har|wbn|json))|(googledrive:\/\/.+)|(ssb:\/\/.+)"
                 .value="${this.fileDisplayName}"
                 @input="${this.onInput}"
                 autocomplete="off"