diff --git a/package-lock.json b/package-lock.json
index 1085c87..cb9be89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5703,6 +5703,14 @@
                 "@types/node": "*"
             }
         },
+        "@types/sax": {
+            "version": "1.2.1",
+            "resolved": "https://registry.npmjs.org/@types/sax/-/sax-1.2.1.tgz",
+            "integrity": "sha512-dqYdvN7Sbw8QT/0Ci5rhjE4/iCMJEM0Y9rHpCu+gGXD9Lwbz28t6HI2yegsB6BoV1sShRMU6lAmAcgRjmFy7LA==",
+            "requires": {
+                "@types/node": "*"
+            }
+        },
         "@types/scheduler": {
             "version": "0.16.1",
             "resolved": "https://registry.npmjs.org/@types/scheduler/-/scheduler-0.16.1.tgz",
@@ -12957,22 +12965,14 @@
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         "gatsby-plugin-sitemap": {
-            "version": "3.3.0",
-            "resolved": "https://registry.npmjs.org/gatsby-plugin-sitemap/-/gatsby-plugin-sitemap-3.3.0.tgz",
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+            "version": "4.0.0",
+            "resolved": "https://registry.npmjs.org/gatsby-plugin-sitemap/-/gatsby-plugin-sitemap-4.0.0.tgz",
+            "integrity": "sha512-+GxxKhB4Lm1AY+k9LfcnATF/LsUXiRHVwM3YDjzpB25WCGrGZGEgviZXiy4xb2BOZz0EoUkYZ9IDU9eNgAoHBQ==",
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                 "common-tags": "^1.8.0",
                 "minimatch": "^3.0.4",
-                "pify": "^3.0.0",
-                "sitemap": "^1.13.0"
-            },
-            "dependencies": {
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-                    "version": "3.0.0",
-                    "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
-                    "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY="
-                }
+                "sitemap": "^6.3.0"
             }
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         "gatsby-plugin-typescript": {
@@ -21665,12 +21665,26 @@
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         "sitemap": {
-            "version": "1.13.0",
-            "resolved": "https://registry.npmjs.org/sitemap/-/sitemap-1.13.0.tgz",
-            "integrity": "sha1-Vpy+IYAgKSamKiZs094Jyc60P4M=",
+            "version": "6.4.0",
+            "resolved": "https://registry.npmjs.org/sitemap/-/sitemap-6.4.0.tgz",
+            "integrity": "sha512-DoPKNc2/apQZTUnfiOONWctwq7s6dZVspxAZe2VPMNtoqNq7HgXRvlRnbIpKjf+8+piQdWncwcy+YhhTGY5USQ==",
             "requires": {
-                "underscore": "^1.7.0",
-                "url-join": "^1.1.0"
+                "@types/node": "^14.14.28",
+                "@types/sax": "^1.2.1",
+                "arg": "^5.0.0",
+                "sax": "^1.2.4"
+            },
+            "dependencies": {
+                "@types/node": {
+                    "version": "14.14.43",
+                    "resolved": "https://registry.npmjs.org/@types/node/-/node-14.14.43.tgz",
+                    "integrity": "sha512-3pwDJjp1PWacPTpH0LcfhgjvurQvrZFBrC6xxjaUEZ7ifUtT32jtjPxEMMblpqd2Mvx+k8haqQJLQxolyGN/cQ=="
+                },
+                "arg": {
+                    "version": "5.0.0",
+                    "resolved": "https://registry.npmjs.org/arg/-/arg-5.0.0.tgz",
+                    "integrity": "sha512-4P8Zm2H+BRS+c/xX1LrHw0qKpEhdlZjLCgWy+d78T9vqa2Z2SiD2wMrYuWIAFy5IZUD7nnNXroRttz+0RzlrzQ=="
+                }
             }
         },
         "slash": {
@@ -23399,11 +23413,6 @@
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             "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo="
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-        "underscore": {
-            "version": "1.13.0",
-            "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.0.tgz",
-            "integrity": "sha512-sCs4H3pCytsb5K7i072FAEC9YlSYFIbosvM0tAKAlpSSUgD7yC1iXSEGdl5XrDKQ1YUB+p/HDzYrSG2H2Vl36g=="
-        },
         "unherit": {
             "version": "1.1.3",
             "resolved": "https://registry.npmjs.org/unherit/-/unherit-1.1.3.tgz",
@@ -23731,11 +23740,6 @@
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-        "url-join": {
-            "version": "1.1.0",
-            "resolved": "https://registry.npmjs.org/url-join/-/url-join-1.1.0.tgz",
-            "integrity": "sha1-dBxsL0WWxIMNZxhGCSDQySIC3Hg="
-        },
         "url-loader": {
             "version": "4.1.1",
             "resolved": "https://registry.npmjs.org/url-loader/-/url-loader-4.1.1.tgz",
diff --git a/package.json b/package.json
index 8d898bd..698e5e7 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
         "gatsby-plugin-robots-txt": "1.5.6",
         "gatsby-plugin-sass": "4.4.0",
         "gatsby-plugin-sharp": "3.4.0",
-        "gatsby-plugin-sitemap": "3.3.0",
+        "gatsby-plugin-sitemap": "4.0.0",
         "gatsby-source-filesystem": "3.4.0",
         "gatsby-transformer-json": "3.4.0",
         "gatsby-transformer-sharp": "3.4.0",