diff --git a/src/app/components/MenuOtherSpaces.svelte b/src/app/components/MenuOtherSpaces.svelte
index 2f7c3469..7159a183 100644
--- a/src/app/components/MenuOtherSpaces.svelte
+++ b/src/app/components/MenuOtherSpaces.svelte
@@ -1,5 +1,7 @@
 <script lang="ts">
+  import {insertAt, removeAt} from "@welshman/lib"
   import MenuSpacesItem from "@app/components/MenuSpacesItem.svelte"
+  import {setSpaceMembershipOrder} from "@app/core/commands"
 
   type Props = {
     urls: string[]
@@ -7,35 +9,31 @@
 
   const {urls}: Props = $props()
 
-  const reorderUrls = (sourceUrl: string, targetUrl: string, currentUrls: string[]) => {
-    if (sourceUrl === targetUrl) {
-      return currentUrls
-    }
+  const isSameOrder = (a: string[], b: string[]) =>
+    a.length === b.length && a.every((url, index) => url === b[index])
 
-    const sourceIndex = currentUrls.indexOf(sourceUrl)
-    const targetIndex = currentUrls.indexOf(targetUrl)
-
-    if (sourceIndex === -1 || targetIndex === -1) {
-      return currentUrls
-    }
-
-    const nextUrls = currentUrls.filter(url => url !== sourceUrl)
-
-    nextUrls.splice(targetIndex, 0, sourceUrl)
-
-    return nextUrls
-  }
-
-  const moveDraggedUrl = (targetUrl: string) => {
+  const reorderSpaceUrls = (targetUrl: string) => {
     if (!draggedUrl) {
       return
     }
 
-    orderedUrls = reorderUrls(draggedUrl, targetUrl, orderedUrls)
+    const sourceIndex = orderedUrls.indexOf(draggedUrl)
+    const targetIndex = orderedUrls.indexOf(targetUrl)
+
+    if (sourceIndex === -1 || targetIndex === -1 || sourceIndex === targetIndex) {
+      return
+    }
+
+    orderedUrls = insertAt(
+      targetIndex,
+      orderedUrls[sourceIndex],
+      removeAt(sourceIndex, orderedUrls),
+    )
   }
 
   const onDragStart = (e: DragEvent, url: string) => {
     draggedUrl = url
+    dragStartOrder = [...orderedUrls]
 
     if (e.dataTransfer) {
       e.dataTransfer.effectAllowed = "move"
@@ -45,21 +43,29 @@
 
   const onDragOver = (e: DragEvent, targetUrl: string) => {
     e.preventDefault()
-    moveDraggedUrl(targetUrl)
+    reorderSpaceUrls(targetUrl)
   }
 
   const onDrop = (e: DragEvent, targetUrl: string) => {
     e.preventDefault()
-    moveDraggedUrl(targetUrl)
+    reorderSpaceUrls(targetUrl)
     draggedUrl = undefined
+
+    if (dragStartOrder && !isSameOrder(dragStartOrder, orderedUrls)) {
+      void setSpaceMembershipOrder(orderedUrls).catch(console.error)
+    }
+
+    dragStartOrder = undefined
   }
 
   const onDragEnd = () => {
     draggedUrl = undefined
+    dragStartOrder = undefined
   }
 
   let orderedUrls = $state([...urls])
   let draggedUrl = $state<string | undefined>()
+  let dragStartOrder = $state<string[] | undefined>()
 </script>
 
 <div class="column menu gap-2 p-3" role="list">
diff --git a/src/app/core/commands.ts b/src/app/core/commands.ts
index b33ec4d9..2ea604a8 100644
--- a/src/app/core/commands.ts
+++ b/src/app/core/commands.ts
@@ -37,6 +37,7 @@ import {
   makeList,
   addToListPublicly,
   removeFromListByPredicate,
+  updateList,
   getTag,
   getListTags,
   getRelayTagValues,
@@ -148,6 +149,20 @@ export const removeSpaceMembership = async (url: string) => {
   return publishThunk({event, relays})
 }
 
+export const setSpaceMembershipOrder = async (urls: string[]) => {
+  const list = get(userGroupList) || makeList({kind: ROOMS})
+  const orderedUrls = uniq(urls.map(normalizeRelayUrl))
+  const relayTags = list.publicTags.filter(t => t[0] === "r")
+  const otherPublicTags = list.publicTags.filter(t => t[0] !== "r")
+  const relayTagByUrl = new Map(relayTags.map(t => [normalizeRelayUrl(t[1]), t]))
+  const orderedRelayTags = orderedUrls.map(url => relayTagByUrl.get(url) || ["r", url])
+  const publicTags = [...orderedRelayTags, ...otherPublicTags]
+  const event = await updateList(list, {publicTags}).reconcile(nip44EncryptToSelf)
+  const relays = uniq([...Router.get().FromUser().getUrls(), ...getRelayTagValues(event.tags)])
+
+  return publishThunk({event, relays})
+}
+
 export const addRoomMembership = async (url: string, h: string) => {
   const list = get(userGroupList) || makeList({kind: ROOMS})
   const newTags = [
diff --git a/src/routes/spaces/+page.svelte b/src/routes/spaces/+page.svelte
index d9b53c4e..48e0875e 100644
--- a/src/routes/spaces/+page.svelte
+++ b/src/routes/spaces/+page.svelte
@@ -1,4 +1,5 @@
 <script lang="ts">
+  import {insertAt, removeAt} from "@welshman/lib"
   import SettingsMinimalistic from "@assets/icons/settings-minimalistic.svg?dataurl"
   import AddCircle from "@assets/icons/add-circle.svg?dataurl"
   import Icon from "@lib/components/Icon.svelte"
@@ -9,6 +10,7 @@
   import MenuSpacesItem from "@app/components/MenuSpacesItem.svelte"
   import SpaceAdd from "@app/components/SpaceAdd.svelte"
   import {userSpaceUrls, loadUserGroupList, PLATFORM_RELAYS} from "@app/core/state"
+  import {setSpaceMembershipOrder} from "@app/core/commands"
   import {pushModal} from "@app/util/modal"
 
   const addSpace = () => pushModal(SpaceAdd)
@@ -28,35 +30,28 @@
   const isSameOrder = (a: string[], b: string[]) =>
     a.length === b.length && a.every((url, index) => url === b[index])
 
-  const reorderUrls = (sourceUrl: string, targetUrl: string, currentUrls: string[]) => {
-    if (sourceUrl === targetUrl) {
-      return currentUrls
-    }
-
-    const sourceIndex = currentUrls.indexOf(sourceUrl)
-    const targetIndex = currentUrls.indexOf(targetUrl)
-
-    if (sourceIndex === -1 || targetIndex === -1) {
-      return currentUrls
-    }
-
-    const nextUrls = currentUrls.filter(url => url !== sourceUrl)
-
-    nextUrls.splice(targetIndex, 0, sourceUrl)
-
-    return nextUrls
-  }
-
-  const moveDraggedUrl = (targetUrl: string) => {
+  const reorderSpaceUrls = (targetUrl: string) => {
     if (!draggedUrl) {
       return
     }
 
-    orderedSpaceUrls = reorderUrls(draggedUrl, targetUrl, orderedSpaceUrls)
+    const sourceIndex = orderedSpaceUrls.indexOf(draggedUrl)
+    const targetIndex = orderedSpaceUrls.indexOf(targetUrl)
+
+    if (sourceIndex === -1 || targetIndex === -1 || sourceIndex === targetIndex) {
+      return
+    }
+
+    orderedSpaceUrls = insertAt(
+      targetIndex,
+      orderedSpaceUrls[sourceIndex],
+      removeAt(sourceIndex, orderedSpaceUrls),
+    )
   }
 
   const onDragStart = (e: DragEvent, url: string) => {
     draggedUrl = url
+    dragStartOrder = [...orderedSpaceUrls]
 
     if (e.dataTransfer) {
       e.dataTransfer.effectAllowed = "move"
@@ -66,17 +61,24 @@
 
   const onDragOver = (e: DragEvent, targetUrl: string) => {
     e.preventDefault()
-    moveDraggedUrl(targetUrl)
+    reorderSpaceUrls(targetUrl)
   }
 
   const onDrop = (e: DragEvent, targetUrl: string) => {
     e.preventDefault()
-    moveDraggedUrl(targetUrl)
+    reorderSpaceUrls(targetUrl)
     draggedUrl = undefined
+
+    if (dragStartOrder && !isSameOrder(dragStartOrder, orderedSpaceUrls)) {
+      void setSpaceMembershipOrder(orderedSpaceUrls).catch(console.error)
+    }
+
+    dragStartOrder = undefined
   }
 
   const onDragEnd = () => {
     draggedUrl = undefined
+    dragStartOrder = undefined
   }
 
   $effect(() => {
@@ -89,6 +91,7 @@
 
   let orderedSpaceUrls = $state<string[]>([])
   let draggedUrl = $state<string | undefined>()
+  let dragStartOrder = $state<string[] | undefined>()
 </script>
 
 <Page class="cw-full">