diff --git a/frontend/src/lib/components/LightweightSchemaForm.svelte b/frontend/src/lib/components/LightweightSchemaForm.svelte
index 0043281c5f..b1fac36c4b 100644
--- a/frontend/src/lib/components/LightweightSchemaForm.svelte
+++ b/frontend/src/lib/components/LightweightSchemaForm.svelte
@@ -25,7 +25,7 @@
 					description={schema.properties[argName].description}
 					bind:value={args[argName]}
 					type={schema.properties[argName].type}
-					required={schema.required.includes(argName)}
+					required={schema.required?.includes(argName) ?? false}
 					pattern={schema.properties[argName].pattern}
 					defaultValue={schema.properties[argName].default}
 					enum_={schema.properties[argName].enum}
diff --git a/frontend/src/lib/components/SchemaForm.svelte b/frontend/src/lib/components/SchemaForm.svelte
index c4da39b930..5fc8fd9005 100644
--- a/frontend/src/lib/components/SchemaForm.svelte
+++ b/frontend/src/lib/components/SchemaForm.svelte
@@ -76,7 +76,7 @@
 								bind:description={schema.properties[argName].description}
 								bind:value={args[argName]}
 								type={schema.properties[argName].type}
-								required={schema.required.includes(argName)}
+								required={schema.required?.includes(argName) ?? false}
 								bind:pattern={schema.properties[argName].pattern}
 								bind:valid={inputCheck[argName]}
 								defaultValue={schema.properties[argName].default}