diff --git a/src/main/scala/net/yoshinorin/qualtet/cache/CacheService.scala b/src/main/scala/net/yoshinorin/qualtet/cache/CacheService.scala
index e59bc9f0..5bf00ea1 100644
--- a/src/main/scala/net/yoshinorin/qualtet/cache/CacheService.scala
+++ b/src/main/scala/net/yoshinorin/qualtet/cache/CacheService.scala
@@ -15,7 +15,7 @@ class CacheService(
   def invalidateAll(): IO[Unit] = {
     sitemapService.invalidate()
     contentTypeService.invalidate()
-    IO(logger.error(s"All caches are invalidated."))
+    IO(logger.info(s"All caches are invalidated."))
   }
 
 }