diff --git a/gatsby-config.js b/gatsby-config.js
index bb54fa5..942c81a 100644
--- a/gatsby-config.js
+++ b/gatsby-config.js
@@ -1,8 +1,10 @@
 module.exports = {
   siteMetadata: {
     title: `Lékol PLUS`,
+    subtitle: ``,
     description: `Institut d'enseignement du primaire au lycée en Guadeloupe`,
     author: `@lekolplus`,
+    siteUrl: "",
   },
   plugins: [
     `gatsby-plugin-react-helmet`,
@@ -27,6 +29,20 @@ module.exports = {
         icon: `src/images/gatsby-icon.png`, // This path is relative to the root of the site.
       },
     },
+    {
+      resolve: `gatsby-plugin-netlify`,
+      options: {
+        headers: {
+          "/*": ["Strict-Transport-Security: max-age=63072000"],
+        }, // option to add more headers. `Link` headers are transformed by the below criteria
+        allPageHeaders: [], // option to add headers for all pages. `Link` headers are transformed by the below criteria
+        mergeSecurityHeaders: true, // boolean to turn off the default security headers
+        mergeLinkHeaders: true, // boolean to turn off the default gatsby js headers
+        mergeCachingHeaders: true, // boolean to turn off the default caching headers
+        transformHeaders: (headers, path) => headers, // optional transform for manipulating headers under each path (e.g.sorting), etc.
+        generateMatchPathRewrites: true, // boolean to turn off automatic creation of redirect rules for client only paths
+      },
+    },
     // this (optional) plugin enables Progressive Web App + Offline functionality
     // To learn more, visit: https://gatsby.dev/offline
     // `gatsby-plugin-offline`,
diff --git a/package.json b/package.json
index 8a992e7..58fb579 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "gatsby": "^2.23.12",
     "gatsby-image": "^2.4.9",
     "gatsby-plugin-manifest": "^2.4.14",
+    "gatsby-plugin-netlify": "^2.3.11",
     "gatsby-plugin-offline": "^3.2.13",
     "gatsby-plugin-react-helmet": "^3.3.6",
     "gatsby-plugin-sharp": "^2.6.14",
diff --git a/yarn.lock b/yarn.lock
index 2d7fcf7..420495c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3132,7 +3132,7 @@ chalk@1.1.3, chalk@^1.0.0, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.1, chalk@^2.4.2:
+chalk@^2.0, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -5816,6 +5816,17 @@ gatsby-plugin-manifest@^2.4.14:
     semver "^5.7.1"
     sharp "^0.25.1"
 
+gatsby-plugin-netlify@^2.3.11:
+  version "2.3.11"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-netlify/-/gatsby-plugin-netlify-2.3.11.tgz#e8c791490a33aadbd7431a83f791caa5ecc01568"
+  integrity sha512-0YOVsqaGwoUwz7bg3wulWnZOkFt3+NUcFvSutWVmmGyp1AzD7ToTwUNPnz/Fai4kG0vb1ChHbMoPWikEvjZUuw==
+  dependencies:
+    "@babel/runtime" "^7.10.3"
+    fs-extra "^8.1.0"
+    kebab-hash "^0.1.2"
+    lodash "^4.17.15"
+    webpack-assets-manifest "^3.1.1"
+
 gatsby-plugin-offline@^3.2.13:
   version "3.2.13"
   resolved "https://registry.yarnpkg.com/gatsby-plugin-offline/-/gatsby-plugin-offline-3.2.13.tgz#49f49539d3ee552da30fe8bf0fb05721fc6e48da"
@@ -8011,6 +8022,13 @@ jsx-ast-utils@^2.4.1:
     array-includes "^3.1.1"
     object.assign "^4.1.0"
 
+kebab-hash@^0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/kebab-hash/-/kebab-hash-0.1.2.tgz#dfb7949ba34d8e70114ea7d83e266e5e2a4abaac"
+  integrity sha512-BTZpq3xgISmQmAVzkISy4eUutsUA7s4IEFlCwOBJjvSFOwyR7I+fza+tBc/rzYWK/NrmFHjfU1IhO3lu29Ib/w==
+  dependencies:
+    lodash.kebabcase "^4.1.1"
+
 keyv@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/keyv/-/keyv-3.0.0.tgz#44923ba39e68b12a7cec7df6c3268c031f2ef373"
@@ -8228,11 +8246,26 @@ lodash.foreach@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.foreach/-/lodash.foreach-4.5.0.tgz#1a6a35eace401280c7f06dddec35165ab27e3e53"
   integrity sha1-Gmo16s5AEoDH8G3d7DUWWrJ+PlM=
 
+lodash.get@^4.0:
+  version "4.4.2"
+  resolved "https://registry.yarnpkg.com/lodash.get/-/lodash.get-4.4.2.tgz#2d177f652fa31e939b4438d5341499dfa3825e99"
+  integrity sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=
+
+lodash.has@^4.0:
+  version "4.5.2"
+  resolved "https://registry.yarnpkg.com/lodash.has/-/lodash.has-4.5.2.tgz#d19f4dc1095058cccbe2b0cdf4ee0fe4aa37c862"
+  integrity sha1-0Z9NwQlQWMzL4rDN9O4P5Ko3yGI=
+
 lodash.isequal@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
   integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
 
+lodash.kebabcase@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/lodash.kebabcase/-/lodash.kebabcase-4.1.1.tgz#8489b1cb0d29ff88195cceca448ff6d6cc295c36"
+  integrity sha1-hImxyw0p/4gZXM7KRI/21swpXDY=
+
 lodash.map@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/lodash.map/-/lodash.map-4.6.0.tgz#771ec7839e3473d9c4cde28b19394c3562f4f6d3"
@@ -8778,7 +8811,7 @@ mkdirp-classic@^0.5.2:
   resolved "https://registry.yarnpkg.com/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz#fa10c9115cc6d8865be221ba47ee9bed78601113"
   integrity sha512-gKLcREMhtuZRwRAfqP3RFW+TK4JqApVBtOIftVgjuABpAtpxhPGaDcfvbhNvD0B8iD1oUr/txX35NjcaY6Ns/A==
 
-mkdirp@^0.5.1, mkdirp@^0.5.3, mkdirp@~0.5.1:
+mkdirp@^0.5, mkdirp@^0.5.1, mkdirp@^0.5.3, mkdirp@~0.5.1:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
   integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
@@ -13208,6 +13241,19 @@ web-namespaces@^1.0.0, web-namespaces@^1.1.2:
   resolved "https://registry.yarnpkg.com/web-namespaces/-/web-namespaces-1.1.4.tgz#bc98a3de60dadd7faefc403d1076d529f5e030ec"
   integrity sha512-wYxSGajtmoP4WxfejAPIr4l0fVh+jeMXZb08wNc0tMg6xsfZXj3cECqIK0G7ZAqUq0PP8WlMDtaOGVBTAWztNw==
 
+webpack-assets-manifest@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/webpack-assets-manifest/-/webpack-assets-manifest-3.1.1.tgz#39bbc3bf2ee57fcd8ba07cda51c9ba4a3c6ae1de"
+  integrity sha512-JV9V2QKc5wEWQptdIjvXDUL1ucbPLH2f27toAY3SNdGZp+xSaStAgpoMcvMZmqtFrBc9a5pTS1058vxyMPOzRQ==
+  dependencies:
+    chalk "^2.0"
+    lodash.get "^4.0"
+    lodash.has "^4.0"
+    mkdirp "^0.5"
+    schema-utils "^1.0.0"
+    tapable "^1.0.0"
+    webpack-sources "^1.0.0"
+
 webpack-dev-middleware@^3.7.2:
   version "3.7.2"
   resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.2.tgz#0019c3db716e3fa5cecbf64f2ab88a74bab331f3"
@@ -13283,7 +13329,7 @@ webpack-merge@^4.2.2:
   dependencies:
     lodash "^4.17.15"
 
-webpack-sources@^1.1.0, webpack-sources@^1.4.0, webpack-sources@^1.4.1:
+webpack-sources@^1.0.0, webpack-sources@^1.1.0, webpack-sources@^1.4.0, webpack-sources@^1.4.1:
   version "1.4.3"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.4.3.tgz#eedd8ec0b928fbf1cbfe994e22d2d890f330a933"
   integrity sha512-lgTS3Xhv1lCOKo7SA5TjKXMjpSM4sBjNV5+q2bqesbSPs5FjGmU6jjtBSkX9b4qW87vDIsCIlUPOEhbZrMdjeQ==