diff --git a/generate-demuxer.ts b/generate-demuxer.ts
index f0ae038..1b3b2a7 100644
--- a/generate-demuxer.ts
+++ b/generate-demuxer.ts
@@ -2,7 +2,9 @@ import findLoudness, { SwapPoint } from "./find-loudness";
 
 const graph_density = 8000;
 
-const threshold_at_point = parseInt(process.env.demuxer_volume_threshold) || 1;
+const threshold_at_point = parseInt(
+  process.env.demuxer_volume_threshold || "1"
+);
 
 const inertia_s = 0.3;
 const inertia_samples = inertia_s * graph_density;