diff --git a/.changeset/soft-drinks-try.md b/.changeset/soft-drinks-try.md
new file mode 100644
index 000000000..b56512714
--- /dev/null
+++ b/.changeset/soft-drinks-try.md
@@ -0,0 +1,5 @@
+---
+'@openfn/project': patch
+---
+
+Include `source_trigger_id` in generated workflows (for lightning compatibility)
diff --git a/packages/project/src/serialize/to-app-state.ts b/packages/project/src/serialize/to-app-state.ts
index 3cade56bf..837bfb0f2 100644
--- a/packages/project/src/serialize/to-app-state.ts
+++ b/packages/project/src/serialize/to-app-state.ts
@@ -94,6 +94,7 @@ const mapWorkflow = (workflow) => {
         id: rules.openfn?.uuid ?? randomUUID(),
         target_job_id: lookup[next],
         enabled: !rules.disabled,
+        source_trigger_id: null, // lightning complains if this isn't set, even if its falsy :(
       };
 
       if (isTrigger) {