diff --git a/src/process.rs b/src/process.rs
index 474e9c6..ad553c5 100644
--- a/src/process.rs
+++ b/src/process.rs
@@ -83,6 +83,9 @@ impl ProcessState {
 
         // Todo for now we rehash everything, which is a bit wasteful but fine for a proto
 
+        // Update state_id
+        self.state_id = self.pcd_commitment.create_merkle_tree()?.root().unwrap().to_lower_hex_string();
+
         // Update the encrypted value
         Value::Object(clear_pcd).encrypt_fields(&[key.to_string()], &mut self.keys, self.encrypted_pcd.as_object_mut().unwrap())?;