diff --git a/apps/git/index.tsx b/apps/git/index.tsx
index 571ec03..962a4b0 100644
--- a/apps/git/index.tsx
+++ b/apps/git/index.tsx
@@ -13,7 +13,7 @@ const DATA_ROOT = process.env.DATA_ROOT!
 const TOES_URL = process.env.TOES_URL!
 
 const REPOS_DIR = resolve(DATA_ROOT, 'repos')
-const VALID_NAME = /^[a-zA-Z0-9_-]+$/
+const VALID_NAME = /^[a-zA-Z0-9._-]+$/
 const VISIBILITY_PATH = join(DATA_DIR, 'visibility.json')
 
 const TOGGLE_SCRIPT = `
diff --git a/src/client/modals/NewApp.tsx b/src/client/modals/NewApp.tsx
index e48e654..f39ce5b 100644
--- a/src/client/modals/NewApp.tsx
+++ b/src/client/modals/NewApp.tsx
@@ -20,8 +20,8 @@ async function createNewApp() {
     return
   }
 
-  if (!/^[a-z][a-z0-9-]*$/.test(name)) {
-    newAppError = 'Name must start with a letter and contain only lowercase letters, numbers, and hyphens'
+  if (!/^[a-z][a-z0-9.-]*$/.test(name)) {
+    newAppError = 'Name must start with a letter and contain only lowercase letters, numbers, dots, and hyphens'
     renderModal()
     return
   }
diff --git a/src/client/modals/RenameApp.tsx b/src/client/modals/RenameApp.tsx
index 3e8c2ca..001e0f2 100644
--- a/src/client/modals/RenameApp.tsx
+++ b/src/client/modals/RenameApp.tsx
@@ -19,8 +19,8 @@ async function doRenameApp(input: HTMLInputElement) {
     return
   }
 
-  if (!/^[a-z][a-z0-9-]*$/.test(newName)) {
-    renameAppError = 'Name must start with a letter and contain only lowercase letters, numbers, and hyphens'
+  if (!/^[a-z][a-z0-9.-]*$/.test(newName)) {
+    renameAppError = 'Name must start with a letter and contain only lowercase letters, numbers, dots, and hyphens'
     renderModal()
     return
   }
diff --git a/src/server/api/apps.ts b/src/server/api/apps.ts
index 06d94a0..9b48081 100644
--- a/src/server/api/apps.ts
+++ b/src/server/api/apps.ts
@@ -120,8 +120,8 @@ router.post('/', async c => {
   const name = body.name?.trim().toLowerCase().replace(/\s+/g, '-')
   if (!name) return c.json({ ok: false, error: 'App name is required' }, 400)
 
-  if (!/^[a-z][a-z0-9-]*$/.test(name)) {
-    return c.json({ ok: false, error: 'Name must start with a letter and contain only lowercase letters, numbers, and hyphens' }, 400)
+  if (!/^[a-z][a-z0-9.-]*$/.test(name)) {
+    return c.json({ ok: false, error: 'Name must start with a letter and contain only lowercase letters, numbers, dots, and hyphens' }, 400)
   }
 
   const appPath = join(APPS_DIR, name)
diff --git a/src/server/apps.ts b/src/server/apps.ts
index b8a4c8e..3751745 100644
--- a/src/server/apps.ts
+++ b/src/server/apps.ts
@@ -176,8 +176,8 @@ export async function renameApp(oldName: string, newName: string): Promise<{ ok:
 
   if (_apps.has(newName)) return { ok: false, error: 'An app with that name already exists' }
 
-  if (!/^[a-z][a-z0-9-]*$/.test(newName)) {
-    return { ok: false, error: 'Name must start with a letter and contain only lowercase letters, numbers, and hyphens' }
+  if (!/^[a-z][a-z0-9.-]*$/.test(newName)) {
+    return { ok: false, error: 'Name must start with a letter and contain only lowercase letters, numbers, dots, and hyphens' }
   }
 
   const oldPath = join(APPS_DIR, oldName)