diff --git a/src/cache.rs b/src/cache.rs
index 533e27a..99b56cc 100644
--- a/src/cache.rs
+++ b/src/cache.rs
@@ -23,6 +23,10 @@ impl CacheEntry {
         let now = chrono::Utc::now();
         now > self.changed + ttl
     }
+
+    pub fn uuid(&self) -> &String {
+        return &self.uuid;
+    }
 }
 
 #[derive(Serialize, Deserialize, Debug)]
diff --git a/src/main.rs b/src/main.rs
index 6f4ccc4..1d9d222 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -93,7 +93,12 @@ fn check_and_notify(
     match cache {
         Ok(mut cache) => {
             if let Some(entry) = cache.get(&mountpoint) {
-                if entry.expired(ttl) {
+                if entry.uuid() != uuid {
+                    cache.update(&mountpoint, &uuid);
+                    if let Err(e) = cache.save(&cache_path) {
+                        eprintln!("Failed to save cache: {}", e);
+                    }
+                } else if entry.expired(ttl) {
                     notify(mountpoint, uuid, entry.changed(), mailto);
                 }
             } else {