diff --git a/package-lock.json b/package-lock.json
index a913c4f..04f622c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3365,12 +3365,12 @@
       }
     },
     "sapper": {
-      "version": "0.20.0",
-      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.20.0.tgz",
-      "integrity": "sha512-Y82mPz7T0lPBtQuB7bldBUi08//8U1MLp8GVpdR0wzM2Hnro6D1QLv0L+ohHIHDPGsYb8T6+NMEX5pdkTF+Z4A==",
+      "version": "0.21.0",
+      "resolved": "https://registry.npmjs.org/sapper/-/sapper-0.21.0.tgz",
+      "integrity": "sha512-uhie/KdZmozvXc4c6j+Zehw/jtxP3claCma22wO/e8fYMm/yw0vffQi2T/Jp8TPDI+GbNiF+tQKkX8axszym2g==",
       "requires": {
         "html-minifier": "^3.5.16",
-        "shimport": "^0.0.10",
+        "shimport": "0.0.11",
         "source-map-support": "^0.5.6",
         "sourcemap-codec": "^1.4.1",
         "string-hash": "^1.1.3",
@@ -3472,9 +3472,9 @@
       }
     },
     "shimport": {
-      "version": "0.0.10",
-      "resolved": "https://registry.npmjs.org/shimport/-/shimport-0.0.10.tgz",
-      "integrity": "sha512-3xPFDLmcLj87sx0OwA60qbloMQUsu6VGF97IG4RqxTf91sGeiaaXOPxM1PoQHbaTm4TOhH8zosokqLAZtuNGnA=="
+      "version": "0.0.11",
+      "resolved": "https://registry.npmjs.org/shimport/-/shimport-0.0.11.tgz",
+      "integrity": "sha512-wRlG/wMuV/czrzJEWBUPjydU/Ve0kTrTH8wHLRjuY6S2BDB+qDDXkTY/WrNc/7t5jnd0LPVO1sRIE7Ga6uXTpw=="
     },
     "sirv": {
       "version": "0.2.1",
@@ -3639,9 +3639,9 @@
       "dev": true
     },
     "sourcemap-codec": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.1.tgz",
-      "integrity": "sha512-hX1eNBNuilj8yfFnECh0DzLgwKpBLMIvmhgEhixXNui8lMLBInTI8Kyxt++RwJnMNu7cAUo635L2+N1TxMJCzA=="
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.3.tgz",
+      "integrity": "sha512-vFrY/x/NdsD7Yc8mpTJXuao9S8lq08Z/kOITHz6b7YbfI9xL8Spe5EvSQUHOI7SbpY8bRPr0U3kKSsPuqEGSfA=="
     },
     "spdx-correct": {
       "version": "3.0.0",
diff --git a/package.json b/package.json
index 3a1a18f..8da42ca 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   "dependencies": {
     "compression": "^1.7.1",
     "polka": "^0.4.0",
-    "sapper": "^0.20.0",
+    "sapper": "^0.21.0",
     "sirv": "^0.2.0"
   },
   "devDependencies": {