diff --git a/package-lock.json b/package-lock.json
index b9360ce..c514b94 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,15 +5,15 @@
   "requires": true,
   "dependencies": {
     "@ampproject/rollup-plugin-closure-compiler": {
-      "version": "0.19.1",
-      "resolved": "https://registry.npmjs.org/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.19.1.tgz",
-      "integrity": "sha512-24mZHXKxBoZwLo5NutdVxAXbbnYBSAjOw/hE/ghiDcvnpVdP7ZQQhaa2ppV6j3lwcBJALlM3L0QL70fcgXzRnA==",
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.20.0.tgz",
+      "integrity": "sha512-p23rglgfCRX95DQsEkJ+i5nOFFWdz1r1+AoekPa74F1w21CNpAankj3Am35AFPZlL6pZhudUpnpXvo8Ck0hgWQ==",
       "dev": true,
       "requires": {
         "acorn": "7.1.0",
         "acorn-dynamic-import": "4.0.0",
         "acorn-walk": "7.0.0",
-        "google-closure-compiler": "20200101.0.0",
+        "google-closure-compiler": "20200112.0.0",
         "magic-string": "0.25.6",
         "uuid": "3.3.3"
       },
@@ -2686,17 +2686,17 @@
       "dev": true
     },
     "google-closure-compiler": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler/-/google-closure-compiler-20200101.0.0.tgz",
-      "integrity": "sha512-UVDxedg7jbi1F+R4KSWezIZcjB4+4EJSvd2Tf/+J8vw5+6BjBFaIv5E3vy9nTpSXorKIUheJPzE+lt9GRc3Fdg==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler/-/google-closure-compiler-20200112.0.0.tgz",
+      "integrity": "sha512-8d43B3hU2pAFy6MD946oslArRe11jPJ/h/VaPPiiSMoSMFxnDpd8jjVJfM2solFSNOOZ9OacA6g/RVGMyp5lvg==",
       "dev": true,
       "requires": {
         "chalk": "2.x",
-        "google-closure-compiler-java": "^20200101.0.0",
-        "google-closure-compiler-js": "^20200101.0.0",
-        "google-closure-compiler-linux": "^20200101.0.0",
-        "google-closure-compiler-osx": "^20200101.0.0",
-        "google-closure-compiler-windows": "^20200101.0.0",
+        "google-closure-compiler-java": "^20200112.0.0",
+        "google-closure-compiler-js": "^20200112.0.0",
+        "google-closure-compiler-linux": "^20200112.0.0",
+        "google-closure-compiler-osx": "^20200112.0.0",
+        "google-closure-compiler-windows": "^20200112.0.0",
         "minimist": "1.x",
         "vinyl": "2.x",
         "vinyl-sourcemaps-apply": "^0.2.0"
@@ -2725,35 +2725,35 @@
       }
     },
     "google-closure-compiler-java": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-java/-/google-closure-compiler-java-20200101.0.0.tgz",
-      "integrity": "sha512-hW4FjcEO3wAu7p/Cz8zwQIggvVio0SmnVzImukK8A6suAyHLiLDX5vhFPC31a/jyZ8uxfUSEImWrt/SFdKt0eA==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler-java/-/google-closure-compiler-java-20200112.0.0.tgz",
+      "integrity": "sha512-h/ExDCXAw88nOniQSbbK6et31kOwmaDxl6t52dnETCIzituQtGToPzy21vUel1o8o+FvWUybLoap+dEYBam1pA==",
       "dev": true
     },
     "google-closure-compiler-js": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-js/-/google-closure-compiler-js-20200101.0.0.tgz",
-      "integrity": "sha512-0PdYhSU2FWkLU7eUg+0+BlnJHcGLMhWB69SzQ/0z7qBES/tuor7ruHi7HUopKaxQwhblC4DtDb8IDinieY+R1w==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler-js/-/google-closure-compiler-js-20200112.0.0.tgz",
+      "integrity": "sha512-xW47rSuiRaql6q1YN7+b3FXIW74b1nCcENVwm9cigw1H5gWoBMBJOmpZiXnjMfmYC+MALjPQ8giMzvSeP+2X5A==",
       "dev": true
     },
     "google-closure-compiler-linux": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-linux/-/google-closure-compiler-linux-20200101.0.0.tgz",
-      "integrity": "sha512-8S1WMbRPrBXV6SUi0DyzHa9EPmyNJ8FcBUG3tIrS6hoQIP71kZl+TrSOwwUAZYKf7KhXl41P3HPMFnI4LXbtrw==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler-linux/-/google-closure-compiler-linux-20200112.0.0.tgz",
+      "integrity": "sha512-imTfdYP7BVTzzp3y7MuZP+98nEkbX7LZsZtxalNpl56vd+Ysc9/vOHXS14CdSoThaXIVlzX/lfjOlBRqPow+ew==",
       "dev": true,
       "optional": true
     },
     "google-closure-compiler-osx": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-osx/-/google-closure-compiler-osx-20200101.0.0.tgz",
-      "integrity": "sha512-rZh2+4/JwhKLVSwOWKBp+WJnLZCfOq6MQW06ayulhvq3WjJ0Ny9XZTpLUKiEbnMQf7+ARcFb8zIeiUp0Q2aFqg==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler-osx/-/google-closure-compiler-osx-20200112.0.0.tgz",
+      "integrity": "sha512-E3S1KqZw4+Zov0VXCkjomPrYhyuuV6jH9InBchQ7cZfipFJjhQmSRf39u4Mu0sINW7GXfODZbzBwOXhEIquFQw==",
       "dev": true,
       "optional": true
     },
     "google-closure-compiler-windows": {
-      "version": "20200101.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-windows/-/google-closure-compiler-windows-20200101.0.0.tgz",
-      "integrity": "sha512-WcH6BPPSiQq1NnOO7PxKfS0FZ+mQRz4pIoRkrItafTKXWtBCL5NZWd8BjPayBJKxsmoiVFsOpkjzLe8ryBXciQ==",
+      "version": "20200112.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-compiler-windows/-/google-closure-compiler-windows-20200112.0.0.tgz",
+      "integrity": "sha512-+5+UJFKXH0LGnYEHSVJxWwhtvX/MI6uebkAQkhma0057QsKs8fOToWuHL8/UbJULB4WUPa3DlHy0+Izs5z6lCQ==",
       "dev": true,
       "optional": true
     },
diff --git a/package.json b/package.json
index b4a3422..8a64938 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "author": "Sam Macbeth",
   "license": "MPL-2.0",
   "devDependencies": {
-    "@ampproject/rollup-plugin-closure-compiler": "^0.19.0",
+    "@ampproject/rollup-plugin-closure-compiler": "^0.20.0",
     "@types/jest": "^24.0.15",
     "@types/node": "^13.1.0",
     "benchmark": "^2.1.4",