diff --git a/src/background.js b/src/background.js
index bf5fd7d..594c7c4 100644
--- a/src/background.js
+++ b/src/background.js
@@ -53,7 +53,7 @@ browser.runtime.onStartup.addListener(async () => {
     try {
       caches.delete(CACHE_NAME);
     } catch (err) {
-      console.log("[clean caches]", err);
+      console.log("[clean caches]", err.message);
     }
   }
 
diff --git a/src/libs/fetch.js b/src/libs/fetch.js
index 829a15b..a62ae9e 100644
--- a/src/libs/fetch.js
+++ b/src/libs/fetch.js
@@ -129,7 +129,7 @@ export const fetchData = async (
       const cache = await caches.open(CACHE_NAME);
       res = await cache.match(cacheReq);
     } catch (err) {
-      console.log("[cache match]", err);
+      console.log("[cache match]", err.message);
     }
   }
 
@@ -151,7 +151,7 @@ export const fetchData = async (
         const cache = await caches.open(CACHE_NAME);
         await cache.put(cacheReq, res.clone());
       } catch (err) {
-        console.log("[cache put]", err);
+        console.log("[cache put]", err.message);
       }
     }
   }