diff --git a/platinum-sw-fetch.html b/platinum-sw-fetch.html
index 032fbe9..ba5a50d 100644
--- a/platinum-sw-fetch.html
+++ b/platinum-sw-fetch.html
@@ -126,7 +126,7 @@
         if (this.path && this.handler) {
           params.route = [this.path, this.handler, this.origin];
         } else {
-          console.log('The following platinum-sw-fetch element will not have any effect. ' +
+          console.warn('The following platinum-sw-fetch element will not have any effect. ' +
             'Both the "path" and "handler" attributes must be set.', this);
         }
         resolve(params);
diff --git a/platinum-sw-import-script.html b/platinum-sw-import-script.html
index 054d08a..9cb4755 100644
--- a/platinum-sw-import-script.html
+++ b/platinum-sw-import-script.html
@@ -50,8 +50,8 @@
         if (this.href) {
           params.importscript = this.href;
         } else {
-          console.log('The following platinum-sw-import-script element will not have any effect. ' +
-            'The "href" attribute must be set.', this);
+          console.warn('The following platinum-sw-import-script element will not have any effect.' +
+            ' The "href" attribute must be set.', this);
         }
         resolve(params);
       }.bind(this));