diff --git a/src/interfaces/ISolidFile.ts b/src/interfaces/ISolidFile.ts
index 45a3a81..e29794d 100644
--- a/src/interfaces/ISolidFile.ts
+++ b/src/interfaces/ISolidFile.ts
@@ -8,8 +8,8 @@ interface ISolidFile {
 interface ISolidFileInfo {
   /** List of files that are part of this torrent. */
   files: ISolidFile[];
-  /** Length of one piece in bytes, e.g. 65536 for 64 KiB, and 4194304 for 4 MiB. */
-  'piece length': 65536 | 4194304;
+  /** Length of one piece in bytes, e.g. 65536 for 64 KiB, 524288 for 512 KiB, and 4194304 for 4 MiB. */
+  'piece length': 65536 | 524288 | 4194304;
   /** Concatenated SHA1 hashes of all pieces, where each hash is 20 bytes long. */
   pieces: string;
   /** Whether the torrent is private, always 0. */
diff --git a/src/ssn/verifySolidpkg.ts b/src/ssn/verifySolidpkg.ts
index 96f179f..75b8200 100644
--- a/src/ssn/verifySolidpkg.ts
+++ b/src/ssn/verifySolidpkg.ts
@@ -41,8 +41,8 @@ export default function verifySolidpkg(file: ISolid, { product, from, to }: {pro
     }
   }
 
-  if (file.info['piece length'] !== 65536 && file.info['piece length'] !== 4194304 ) {
-    throw new Error(`Expected piece length to be "65536" or "4194304" but it was "${file.info['piece length']}".`);
+  if (!([0x1_0000, 0x8_0000, 0x40_0000]).includes(file.info['piece length'])) {
+    throw new Error(`Expected piece length to be "65536", "524288" or "4194304" but it was "${file.info['piece length']}".`);
   }
   if (typeof file.info.pieces !== 'string') {
     throw new Error(`Expected pieces to be a string but it was "${file.info.pieces}".`);