diff --git a/lib/index.js b/lib/index.js
index 82ab79f..ad56942 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,5 +1,5 @@
 const makeDebug = require('debug')
-const MsgV3 = require('ppppp-db/msg-v3')
+const MsgV4 = require('ppppp-db/msg-v4')
 
 /**
  * @typedef {ReturnType<import('ppppp-db').init>} PPPPPDB
@@ -89,7 +89,7 @@ function initConductor(peer, config) {
   /**
    * How many bytes does a single msg ID take up
    */
-  const MSG_ID_BYTES = MsgV3.getMootID('dummy', 'dummy').length
+  const MSG_ID_BYTES = MsgV4.getMootID('dummy', 'dummy').length
 
   /**
    * How many bytes does an average msg take up
diff --git a/test/follow-feeds.test.js b/test/follow-feeds.test.js
index 90524e5..5c99608 100644
--- a/test/follow-feeds.test.js
+++ b/test/follow-feeds.test.js
@@ -388,8 +388,8 @@ test('Set and Dict ghost spans', async (t) => {
   alice.conductor.start(aliceID, [['post@all'], ['post@all']], 4_000)
   bob.conductor.start(bobID, [['post@all'], ['post@all']], 4_000)
 
-  assert.equal(alice.set.getGhostSpan(), 11916, 'alice set ghost span is 2')
-  assert.equal(alice.dict.getGhostSpan(), 11916, 'alice set ghost span is 2')
+  assert.equal(alice.set.getGhostSpan(), 5958, 'alice set ghost span is 2')
+  assert.equal(alice.dict.getGhostSpan(), 5958, 'alice set ghost span is 2')
 
   await p(alice.close)(true)
   await p(bob.close)(true)