diff --git a/artifacts/lez/programs/fee.bin b/artifacts/lez/programs/fee.bin
index 0b82a2847..980875b12 100644
Binary files a/artifacts/lez/programs/fee.bin and b/artifacts/lez/programs/fee.bin differ
diff --git a/lez/programs/fee/src/main.rs b/lez/programs/fee/src/main.rs
index 048776d8c..f0f8f2a22 100644
--- a/lez/programs/fee/src/main.rs
+++ b/lez/programs/fee/src/main.rs
@@ -23,6 +23,10 @@ fn main() {
         },
         instruction_words,
     ) = read_lee_inputs::<Instruction>();
+    assert!(
+        caller_program_id.is_none(),
+        "Fee program is only invoked as a top-level sequencer transaction"
+    );
 
     let Ok([pre_state, pre_escrow, pre_inbox]) = <[_; 3]>::try_from(pre_states) else {
         panic!("Invalid number of input accounts");
diff --git a/test_fixtures/fixtures/prebuilt_sequencer_db.dump b/test_fixtures/fixtures/prebuilt_sequencer_db.dump
index fd0a2ad73..c364b3cb2 100644
Binary files a/test_fixtures/fixtures/prebuilt_sequencer_db.dump and b/test_fixtures/fixtures/prebuilt_sequencer_db.dump differ