diff --git a/solutions/system_design/web_crawler/README.md b/solutions/system_design/web_crawler/README.md
index e6e79ad2..411197ee 100644
--- a/solutions/system_design/web_crawler/README.md
+++ b/solutions/system_design/web_crawler/README.md
@@ -77,7 +77,7 @@ Handy conversion guide:
 
 ### Use case: Service crawls a list of urls
 
-We'll assume we have an initial list of `links_to_crawl` ranked initially based on overall site popularity.  If this is not a reasonable assumption, we can seed the crawler with popular sites that link to outside content such as [Yahoo](https://www.yahoo.com/), [DMOZ](http://www.dmoz.org/), etc.
+We'll assume we have an initial list of `links_to_crawl` ranked initially based on overall site popularity.  If this is not a reasonable assumption, we can seed the crawler with popular sites that link to outside content such as [Yahoo](https://www.yahoo.com/), [DMOZ](https://dmoz-odp.org/), etc.
 
 We'll use a table `crawled_links` to store processed links and their page signatures.