diff --git a/recipes.json b/recipes.json
index 68d1918..73f988e 100644
--- a/recipes.json
+++ b/recipes.json
@@ -5,7 +5,7 @@
     "controllers": [
         "(make-duty-controller \"humidifier\" 0.6 100 '<)",
         "(make-duty-controller \"freezer\" 0.4 100 '>)",
-        "(make-duty-controller \"heater\" 1.0 100 '>)",
+        "(make-duty-controller \"heater\" 1.0 100 '>)"
     ],
     "phases": [
       {