diff --git a/js/src/api/types.ts b/js/src/api/types.ts
index 1583c24..7660817 100644
--- a/js/src/api/types.ts
+++ b/js/src/api/types.ts
@@ -67,12 +67,18 @@ export const StreamPropertiesSchema = z.object({
   name: z.string(),
   status: z.enum(["open", "closed"]),
   description: z.string().optional(),
+  // e.g. ["human:aron@acme.com", "human:john@acme.com"] - visible only to Aron and John
+  // e.g. ["network:123"] - visible to everyone in the network
+  visible_to: z.array(z.string())
 });
 export type StreamProperties = z.infer<typeof StreamPropertiesSchema>;
 
 export const FolderPropertiesSchema = z.object({
   name: z.string(),
   color: z.string().optional(),
+  // e.g. ["human:aron@acme.com", "human:john@acme.com"] - visible only to Aron and John
+  // e.g. ["network:123"] - visible to everyone in the network
+  visible_to: z.array(z.string())
 });
 export type FolderProperties = z.infer<typeof FolderPropertiesSchema>;
 
@@ -128,9 +134,6 @@ const ParticleBaseSchema = z.object({
   created_at: z.coerce.date(),
   created_by_email: z.string().email(),
   updated_at: z.coerce.date().optional(),
-  // e.g. ["human:aron@acme.com", "human:john@acme.com"] - visible only to Aron and John
-  // e.g. ["network:123"] - visible to everyone in the network
-  visible_to: z.array(z.string())
 });
 
 export const ParticleSchema = z.discriminatedUnion("type", [
diff --git a/js/src/lib/firestore-particles.ts b/js/src/lib/firestore-particles.ts
index 961860b..a08ecc7 100644
--- a/js/src/lib/firestore-particles.ts
+++ b/js/src/lib/firestore-particles.ts
@@ -92,7 +92,6 @@ export async function createParticle<T extends ParticleType>(
   type: T,
   properties: ParticlePropertiesMap[T],
   createdByEmail: string,
-  visibleTo: string[],
 ): Promise<string> {
   const particle: Particle = ParticleSchema.parse({
     id: "", // ignored by toFirestore, but needed to satisfy the type
@@ -101,7 +100,6 @@ export async function createParticle<T extends ParticleType>(
     created_at: new Date(),
     created_by_email: createdByEmail,
     updated_at: null,
-    visible_to: visibleTo,
   });
   const ref = await addDoc(typedCollection(collectionPath), particle);
   return ref.id;
@@ -111,7 +109,6 @@ export async function createParticle<T extends ParticleType>(
 export async function updateParticle<T extends ParticleType>(
   docPath: string,
   properties: Partial<ParticlePropertiesMap[T]>,
-  visibleTo?: string[],
 ): Promise<void> {
   const particleRef = typedDoc(docPath);
   // Take the partial and create a new object with dot notation
@@ -123,6 +120,5 @@ export async function updateParticle<T extends ParticleType>(
   await updateDoc(particleRef, {
     ...updatedProperties,
     updated_at: serverTimestamp(),
-    ...(visibleTo ? { visible_to: visibleTo } : {}),
   });
 }