diff --git a/frontend/src/components/config-details.ts b/frontend/src/components/config-details.ts
index 92754da0..e2e781f4 100644
--- a/frontend/src/components/config-details.ts
+++ b/frontend/src/components/config-details.ts
@@ -267,9 +267,10 @@ export class ConfigDetails extends LiteElement {
     const crawlConfig = this.crawlConfig!;
     const seedsConfig = crawlConfig.config;
     const additionalUrlList = seedsConfig.seeds.slice(1);
-    const primarySeedConfig: SeedConfig | Seed = seedsConfig;
-    const primarySeedUrl = seedsConfig.seeds[0].url;
-    const includeUrlList = primarySeedConfig.include || seedsConfig.include;
+    const primarySeedConfig: SeedConfig | Seed = seedsConfig.seeds[0];
+    const primarySeedUrl = primarySeedConfig.url;
+    const includeUrlList =
+      primarySeedConfig.include || seedsConfig.include || [];
     return html`
       ${this.renderSetting(msg("Primary Seed URL"), primarySeedUrl, true)}
       ${this.renderSetting(
@@ -303,7 +304,10 @@ export class ConfigDetails extends LiteElement {
         additionalUrlList?.length
           ? html`
               <ul>
-                ${additionalUrlList.map((url) => html`<li>${url}</li>`)}
+                ${additionalUrlList.map(
+                  (seed) =>
+                    html`<li>${typeof seed === "string" ? seed : seed.url}</li>`
+                )}
               </ul>
             `
           : msg("None"),
diff --git a/frontend/src/pages/org/workflow-editor.ts b/frontend/src/pages/org/workflow-editor.ts
index 3b688169..42294fdb 100644
--- a/frontend/src/pages/org/workflow-editor.ts
+++ b/frontend/src/pages/org/workflow-editor.ts
@@ -195,6 +195,8 @@ const urlListToArray = flow(
   (str: string) => (str.length ? str.trim().split(/\s+/g) : []),
   trimArray
 );
+const mapSeedToUrl = (arr: Seed[]) =>
+  arr.map((seed) => (typeof seed === "string" ? seed : seed.url));
 const DEFAULT_BEHAVIORS = [
   "autoscroll",
   "autoplay",
@@ -428,13 +430,11 @@ export class CrawlConfigEditor extends LiteElement {
       }
       const additionalSeeds = seeds.slice(1);
       if (additionalSeeds.length) {
-        formState.urlList = additionalSeeds.join("\n");
+        formState.urlList = mapSeedToUrl(additionalSeeds).join("\n");
       }
     } else {
       // Treat "custom" like URL list
-      formState.urlList = seeds
-        .map((seed) => (typeof seed === "string" ? seed : seed.url))
-        .join("\n");
+      formState.urlList = mapSeedToUrl(seeds).join("\n");
 
       if (this.initialWorkflow.jobType === "custom") {
         formState.scopeType = seedsConfig.scopeType || "page";
diff --git a/frontend/src/types/crawler.ts b/frontend/src/types/crawler.ts
index a5303c62..6007e6aa 100644
--- a/frontend/src/types/crawler.ts
+++ b/frontend/src/types/crawler.ts
@@ -10,8 +10,8 @@ type ScopeType =
 export type Seed = {
   url: string;
   scopeType: ScopeType;
-  include?: string[];
-  exclude?: string[];
+  include?: string[] | null;
+  exclude?: string[] | null;
   limit?: number | null;
   extraHops?: number | null;
 };