diff --git a/kubejs/startup_scripts/gtceu/recipe_types.js b/kubejs/startup_scripts/gtceu/recipe_types.js
index 7f6f60476..7477493db 100644
--- a/kubejs/startup_scripts/gtceu/recipe_types.js
+++ b/kubejs/startup_scripts/gtceu/recipe_types.js
@@ -20,7 +20,7 @@ const registerGTCEuRecipeTypes = (event) => {
 	event.create('nether_dome')
 		.category('nether_dome')
 		.setEUIO('in')
-		.setMaxIOSize(1, 1, 1, 1)
+		.setMaxIOSize(2, 1, 1, 1)
 		.setSlotOverlay(false, false, GuiTextures.SOLIDIFIER_OVERLAY)
         .setProgressBar(GuiTextures.PROGRESS_BAR_GAS_COLLECTOR, FillDirection.LEFT_TO_RIGHT)
         .setSound(GTSoundEntries.FIRE)
@@ -28,7 +28,7 @@ const registerGTCEuRecipeTypes = (event) => {
 	event.create('end_dome')
 		.category('end_dome')
 		.setEUIO('in')
-		.setMaxIOSize(1, 1, 1, 1)
+		.setMaxIOSize(2, 1, 1, 1)
 		.setSlotOverlay(false, false, GuiTextures.SOLIDIFIER_OVERLAY)
         .setProgressBar(GuiTextures.PROGRESS_BAR_GAS_COLLECTOR, FillDirection.LEFT_TO_RIGHT)
         .setSound(GTSoundEntries.FIRE)