diff --git a/yarn.lock b/yarn.lock
index a02135677..4a0c9c4f2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4736,6 +4736,16 @@ gatsby-plugin-sharp@^2.2.7:
     sharp "^0.23.0"
     svgo "^1.3.0"
 
+gatsby-plugin-sitemap@^2.2.8:
+  version "2.2.8"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sitemap/-/gatsby-plugin-sitemap-2.2.8.tgz#b18ea1a258d5044474435896e9b8b45688a46b99"
+  integrity sha512-FDWspoz4cymHis6d+PrDWm4RudoVHcGT1sjoiL8/i/zKaFZCVyDmxK2JDAy6TdpK4nLr/wc+np4n+Y5lKgfDRw==
+  dependencies:
+    "@babel/runtime" "^7.0.0"
+    minimatch "^3.0.4"
+    pify "^3.0.0"
+    sitemap "^1.13.0"
+
 gatsby-plugin-transition-link@^1.12.4:
   version "1.12.4"
   resolved "https://registry.yarnpkg.com/gatsby-plugin-transition-link/-/gatsby-plugin-transition-link-1.12.4.tgz#2720ec154e28981de906c200c16a240d6cb59cba"
@@ -9803,6 +9813,14 @@ sisteransi@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sisteransi/-/sisteransi-1.0.3.tgz#98168d62b79e3a5e758e27ae63c4a053d748f4eb"
 
+sitemap@^1.13.0:
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/sitemap/-/sitemap-1.13.0.tgz#569cbe2180202926a62a266cd3de09c9ceb43f83"
+  integrity sha1-Vpy+IYAgKSamKiZs094Jyc60P4M=
+  dependencies:
+    underscore "^1.7.0"
+    url-join "^1.1.0"
+
 slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
@@ -10716,6 +10734,11 @@ underscore.string@^3.3.5:
     sprintf-js "^1.0.3"
     util-deprecate "^1.0.2"
 
+underscore@^1.7.0:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.1.tgz#06dce34a0e68a7babc29b365b8e74b8925203961"
+  integrity sha512-5/4etnCkd9c8gwgowi5/om/mYO5ajCaOgdzj/oW+0eQV9WxKBDZw5+ycmKmeaTXjInS/W0BzpGLo2xR2aBwZdg==
+
 unherit@^1.0.4:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/unherit/-/unherit-1.1.2.tgz#14f1f397253ee4ec95cec167762e77df83678449"
@@ -10915,6 +10938,11 @@ urix@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
 
+url-join@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-1.1.0.tgz#741c6c2f4596c4830d6718460920d0c92202dc78"
+  integrity sha1-dBxsL0WWxIMNZxhGCSDQySIC3Hg=
+
 url-loader@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/url-loader/-/url-loader-1.1.2.tgz#b971d191b83af693c5e3fea4064be9e1f2d7f8d8"