diff --git a/package-lock.json b/package-lock.json
index a36ac34..71d1add 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -147,6 +147,11 @@
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+        "array-unique": {
+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
+          "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM="
+        },
+        "braces": {
+          "version": "1.8.5",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
+          "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
+          "requires": {
+            "expand-range": "1.8.2",
+            "preserve": "0.2.0",
+            "repeat-element": "1.1.2"
+          }
+        },
+        "chalk": {
+          "version": "2.3.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.2.tgz",
+          "integrity": "sha512-ZM4j2/ld/YZDc3Ma8PgN7gyAk+kHMMMyzLNryCPGhWrsfAuDVeuid5bpRFTDgMH9JBK2lA4dyyAkkZYF/WcqDQ==",
+          "requires": {
+            "ansi-styles": "3.2.1",
+            "escape-string-regexp": "1.0.5",
+            "supports-color": "5.3.0"
+          }
+        },
+        "chokidar": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-1.7.0.tgz",
+          "integrity": "sha1-eY5ol3gVHIB2tLNg5e3SjNortGg=",
+          "requires": {
+            "anymatch": "1.3.2",
+            "async-each": "1.0.1",
+            "fsevents": "1.1.3",
+            "glob-parent": "2.0.0",
+            "inherits": "2.0.3",
+            "is-binary-path": "1.0.1",
+            "is-glob": "2.0.1",
+            "path-is-absolute": "1.0.1",
+            "readdirp": "2.1.0"
+          }
+        },
+        "expand-brackets": {
+          "version": "0.1.5",
+          "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-0.1.5.tgz",
+          "integrity": "sha1-3wcoTjQqgHzXM6xa9yQR5YHRF3s=",
+          "requires": {
+            "is-posix-bracket": "0.1.1"
+          }
+        },
+        "extglob": {
+          "version": "0.3.2",
+          "resolved": "https://registry.npmjs.org/extglob/-/extglob-0.3.2.tgz",
+          "integrity": "sha1-Lhj/PS9JqydlzskCPwEdqo2DSaE=",
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
+        },
+        "glob-parent": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-2.0.0.tgz",
+          "integrity": "sha1-gTg9ctsFT8zPUzbaqQLxgvbtuyg=",
+          "requires": {
+            "is-glob": "2.0.1"
+          }
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
+        },
+        "is-extglob": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-1.0.0.tgz",
+          "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA="
+        },
+        "is-glob": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-2.0.1.tgz",
+          "integrity": "sha1-0Jb5JqPe1WAPP9/ZEZjLCIjC2GM=",
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
+        },
+        "micromatch": {
+          "version": "2.3.11",
+          "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-2.3.11.tgz",
+          "integrity": "sha1-hmd8l9FyCzY0MdBNDRUpO9OMFWU=",
+          "requires": {
+            "arr-diff": "2.0.0",
+            "array-unique": "0.2.1",
+            "braces": "1.8.5",
+            "expand-brackets": "0.1.5",
+            "extglob": "0.3.2",
+            "filename-regex": "2.0.1",
+            "is-extglob": "1.0.0",
+            "is-glob": "2.0.1",
+            "kind-of": "3.2.2",
+            "normalize-path": "2.1.1",
+            "object.omit": "2.0.1",
+            "parse-glob": "3.0.4",
+            "regex-cache": "0.4.4"
+          }
+        },
+        "supports-color": {
+          "version": "5.3.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.3.0.tgz",
+          "integrity": "sha512-0aP01LLIskjKs3lq52EC0aGBAJhLq7B2Rd8HC/DR/PtNNpcLilNmHC12O+hu0usQpo7wtHNRqtrhBwtDb0+dNg==",
+          "requires": {
+            "has-flag": "3.0.0"
+          }
+        }
+      }
+    },
     "sass-graph": {
       "version": "2.2.4",
       "resolved": "https://registry.npmjs.org/sass-graph/-/sass-graph-2.2.4.tgz",
@@ -10503,6 +10920,17 @@
         }
       }
     },
+    "webpack-hot-middleware": {
+      "version": "2.21.2",
+      "resolved": "https://registry.npmjs.org/webpack-hot-middleware/-/webpack-hot-middleware-2.21.2.tgz",
+      "integrity": "sha512-N5c80o31E0COFJV8HRjiX3hJetDOwQ2Ajt5TTORKA9diOimhFtmaZKSfO3pQKMeQngb7I4TUnNDroJiUzPFhKQ==",
+      "requires": {
+        "ansi-html": "0.0.7",
+        "html-entities": "1.2.1",
+        "querystring": "0.2.0",
+        "strip-ansi": "3.0.1"
+      }
+    },
     "webpack-sources": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.1.0.tgz",
@@ -10658,6 +11086,11 @@
         "safe-buffer": "5.1.1"
       }
     },
+    "x-xss-protection": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/x-xss-protection/-/x-xss-protection-1.1.0.tgz",
+      "integrity": "sha512-rx3GzJlgEeZ08MIcDsU2vY2B1QEriUKJTSiNHHUIem6eg9pzVOr2TL3Y4Pd6TMAM5D5azGjcxqI62piITBDHVg=="
+    },
     "xml2js": {
       "version": "0.4.19",
       "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.19.tgz",
diff --git a/package.json b/package.json
index 9cfc133..013e19d 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "font-awesome-svg-png": "^1.2.2",
     "form-data": "^2.3.2",
     "glob": "^7.1.2",
-    "helmet-csp": "^2.7.0",
+    "helmet": "^3.12.0",
     "indexeddb-getall-shim": "^1.3.1",
     "intersection-observer": "^0.5.0",
     "lodash": "^4.17.5",
diff --git a/server.js b/server.js
index fccacca..a138473 100644
--- a/server.js
+++ b/server.js
@@ -3,7 +3,7 @@ const compression = require('compression')
 const sapper = require('sapper')
 const serveStatic = require('serve-static')
 const app = express()
-const csp = require('helmet-csp')
+const helmet = require('helmet')
 
 const headScriptChecksum = require('./inline-script-checksum').checksum
 
@@ -18,14 +18,16 @@ global.fetch = (url, opts) => {
 
 app.use(compression({ threshold: 0 }))
 
-app.use(csp({
-  directives: {
-    scriptSrc: [`'self'`, `'sha256-${headScriptChecksum}'`],
-    workerSrc: [`'self'`],
-    styleSrc: [`'self'`, `'unsafe-inline'`],
-    frameSrc: [`'none'`],
-    objectSrc: [`'none'`],
-    manifestSrc: [`'self'`]
+app.use(helmet({
+  contentSecurityPolicy: {
+    directives: {
+      scriptSrc: [`'self'`, `'sha256-${headScriptChecksum}'`],
+      workerSrc: [`'self'`],
+      styleSrc: [`'self'`, `'unsafe-inline'`],
+      frameSrc: [`'none'`],
+      objectSrc: [`'none'`],
+      manifestSrc: [`'self'`]
+    }
   }
 }))