diff --git a/Gemfile.lock b/Gemfile.lock
index 2864b56..8bc607c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,6 @@
 GIT
-  remote: git://github.com/jekyll/jekyll-sitemap.git
-  revision: cf585a99ce4337884fa64f12f5b0fef6b07e349f
+  remote: https://github.com/jekyll/jekyll-sitemap.git
+  revision: 99148a2255a2b3a8d2b31ba8216945262981b12c
   branch: master
   specs:
     jekyll-sitemap (1.4.0)
@@ -15,8 +15,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs