diff --git a/lib/commands/block.js b/lib/commands/block.js
index ea6a19dc2..195e0c494 100644
--- a/lib/commands/block.js
+++ b/lib/commands/block.js
@@ -167,7 +167,7 @@ Block.writeLoginBlock = function (Env, safeKey, msg, _cb) {
     });
 };
 
-const DELETE_BLOCK = Nacl.util.decodeUTF8('DELETE_BLOCK');
+const DELETE_BLOCK = Nacl.util.encodeBase64(Nacl.util.decodeUTF8('DELETE_BLOCK'));
 
 /*
     When users write a block, they upload the block, and provide