diff --git a/packages/viewer/src/context.ts b/packages/viewer/src/context.ts
index 5ad3a726..4b641317 100644
--- a/packages/viewer/src/context.ts
+++ b/packages/viewer/src/context.ts
@@ -66,7 +66,10 @@ export function initialize({
 
   db.subscribe(project(store))
 
-  if (!pre.sync) {
+  if (
+    !pre.sync ||
+    new Date(pre.sync.at).getTime() < Date.now() - 7 * 24 * 60 * 60 * 1000
+  ) {
     store.sync.sync()
   }
 
diff --git a/packages/viewer/src/stores/index.ts b/packages/viewer/src/stores/index.ts
index 2fb5c2a1..f4a8236d 100644
--- a/packages/viewer/src/stores/index.ts
+++ b/packages/viewer/src/stores/index.ts
@@ -94,7 +94,10 @@ export function create(pre: Prestore, gateway: Gateway.Sync): Store {
 
   set(pre.properties, pre.spaces, pre.theorems, pre.traits)
 
-  if (!pre.sync) {
+  if (
+    !pre.sync ||
+    new Date(pre.sync.at).getTime() < Date.now() - 7 * 24 * 60 * 60 * 1000
+  ) {
     sync.sync()
   }