diff --git a/gatsby-config.js b/gatsby-config.js
index 2940836..dc85539 100644
--- a/gatsby-config.js
+++ b/gatsby-config.js
@@ -16,6 +16,7 @@ module.exports = {
       },
     },
     'gatsby-plugin-robots-txt',
-    'gatsby-plugin-sitemap'
+    'gatsby-plugin-sitemap',
+    'gatsby-plugin-sri'
   ],
 }
diff --git a/package-lock.json b/package-lock.json
index 3c1afa7..e5f158b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9751,6 +9751,15 @@
         }
       }
     },
+    "gatsby-plugin-sri": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/gatsby-plugin-sri/-/gatsby-plugin-sri-1.1.0.tgz",
+      "integrity": "sha512-1CljeDf6GYJxVer0NlwzHoKr1IUNyaYU9E7j6102hFJ4NAfs7Rywg6qKXnJkuKuA4+6t8LYqwAueFRHN4IMQGA==",
+      "requires": {
+        "glob": "^7.1.6",
+        "replace-in-file": "^5.0.2"
+      }
+    },
     "gatsby-plugin-theme-ui": {
       "version": "0.4.0-rc.5",
       "resolved": "https://registry.npmjs.org/gatsby-plugin-theme-ui/-/gatsby-plugin-theme-ui-0.4.0-rc.5.tgz",
@@ -18079,6 +18088,62 @@
       "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-1.0.0.tgz",
       "integrity": "sha1-3mMSg3P8v3w8z6TeWkgMRaZ5WOs="
     },
+    "replace-in-file": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/replace-in-file/-/replace-in-file-5.0.2.tgz",
+      "integrity": "sha512-1Vc7Sbr/rTuHgU1PZuBb7tGsFx3D4NKdhV4BpEF2MuN/6+SoXcFtx+dZ1Zz+5Dq4k5x9js87Y+gXQYPTQ9ppkA==",
+      "requires": {
+        "chalk": "^3.0.0",
+        "glob": "^7.1.6",
+        "yargs": "^15.0.2"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
+          "integrity": "sha512-9VGjrMsG1vePxcSweQsN20KY/c4zN0h9fLjqAbwbPfahM3t+NL+M9HC8xeXG2I8pX5NoamTGNuomEUFI7fcUjA==",
+          "requires": {
+            "@types/color-name": "^1.1.1",
+            "color-convert": "^2.0.1"
+          }
+        },
+        "chalk": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-3.0.0.tgz",
+          "integrity": "sha512-4D3B6Wf41KOYRFdszmDqMCGq5VV/uMAB273JILmO+3jAlh8X4qDtdtgCR3fxtbLEMzSx22QdhnDcJvu2u1fVwg==",
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+          "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+          "requires": {
+            "color-name": "~1.1.4"
+          }
+        },
+        "color-name": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
+        },
+        "has-flag": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
+        },
+        "supports-color": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
     "request": {
       "version": "2.88.2",
       "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
diff --git a/package.json b/package.json
index 8c406c9..660a48b 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "gatsby": "^2.23.18",
     "gatsby-plugin-robots-txt": "^1.5.3",
     "gatsby-plugin-sitemap": "^2.4.14",
+    "gatsby-plugin-sri": "^1.1.0",
     "gatsby-theme-code-notes": "^1.15.1",
     "gzipper": "^4.0.2",
     "react": "^16.13.1",