diff --git a/Gemfile.lock b/Gemfile.lock
index 7ed5327..ef310ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,10 +1,10 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.9)
+    addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     base64 (0.3.0)
-    bigdecimal (4.1.0)
+    bigdecimal (4.1.1)
     colorator (1.1.0)
     concurrent-ruby (1.3.6)
     csv (3.3.5)
@@ -81,6 +81,8 @@ GEM
       sass-embedded (~> 1.75)
     jekyll-seo-tag (2.8.0)
       jekyll (>= 3.8, < 5.0)
+    jekyll-sitemap (1.4.0)
+      jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
     json (2.19.3)
@@ -171,12 +173,13 @@ DEPENDENCIES
   jekyll (~> 4.3)
   jekyll-relative-links
   jekyll-seo-tag
+  jekyll-sitemap
   just-the-docs (~> 0.10)
 
 CHECKSUMS
-  addressable (2.8.9) sha256=cc154fcbe689711808a43601dee7b980238ce54368d23e127421753e46895485
+  addressable (2.9.0) sha256=7fdf6ac3660f7f4e867a0838be3f6cf722ace541dd97767fa42bc6cfa980c7af
   base64 (0.3.0) sha256=27337aeabad6ffae05c265c450490628ef3ebd4b67be58257393227588f5a97b
-  bigdecimal (4.1.0) sha256=6dc07767aa3dc456ccd48e7ae70a07b474e9afd7c5bc576f80bd6da5c8dd6cae
+  bigdecimal (4.1.1) sha256=1c09efab961da45203c8316b0cdaec0ff391dfadb952dd459584b63ebf8054ca
   colorator (1.1.0) sha256=e2f85daf57af47d740db2a32191d1bdfb0f6503a0dfbc8327d0c9154d5ddfc38
   concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
   csv (3.3.5) sha256=6e5134ac3383ef728b7f02725d9872934f523cb40b961479f69cf3afa6c8e73f
@@ -210,6 +213,7 @@ CHECKSUMS
   jekyll-relative-links (0.7.0) sha256=831e54c348eeae751845c0d4ac4b244bd73b664341f0e8c9f1803b16f4570835
   jekyll-sass-converter (3.1.0) sha256=83925d84f1d134410c11d0c6643b0093e82e3a3cf127e90757a85294a3862443
   jekyll-seo-tag (2.8.0) sha256=3f2ed1916d56f14ebfa38e24acde9b7c946df70cb183af2cb5f0598f21ae6818
+  jekyll-sitemap (1.4.0) sha256=0de08c5debc185ea5a8f980e1025c7cd3f8e0c35c8b6ef592f15c46235cf4218
   jekyll-watch (2.2.1) sha256=bc44ed43f5e0a552836245a54dbff3ea7421ecc2856707e8a1ee203a8387a7e1
   json (2.19.3) sha256=289b0bb53052a1fa8c34ab33cc750b659ba14a5c45f3fcf4b18762dc67c78646
   just-the-docs (0.12.0) sha256=15f2839ac9082898d60f33b978aa6f8e46fc50ba8fac20ae7a7f0e1fb295523e