diff --git a/package.json b/package.json
index 2ee9317..6fdef2c 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   },
   "devDependencies": {
     "@ampproject/filesize": "4.2.0",
-    "@ampproject/rollup-plugin-closure-compiler": "0.26.0",
+    "@ampproject/rollup-plugin-closure-compiler": "0.27.0",
     "@types/chai": "4.2.11",
     "@types/mocha": "7.0.2",
     "acorn-walk": "7.1.1",
diff --git a/yarn.lock b/yarn.lock
index 6c6c5a7..5e8de93 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -21,16 +21,16 @@
     "@jridgewell/resolve-uri" "1.0.0"
     sourcemap-codec "1.4.8"
 
-"@ampproject/rollup-plugin-closure-compiler@0.26.0":
-  version "0.26.0"
-  resolved "https://registry.yarnpkg.com/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.26.0.tgz#69f8265e5fdbf3e26905eaaedc60cb5982bd6be0"
-  integrity sha512-wuHzGE6BDhDR0L7nUPlpQDPGiGnMw+b0B+cDPG0S5TatOmFNQva8KSNdBHan3L9RbvNyYXOXicuCrZtSoBfrBg==
+"@ampproject/rollup-plugin-closure-compiler@0.27.0":
+  version "0.27.0"
+  resolved "https://registry.yarnpkg.com/@ampproject/rollup-plugin-closure-compiler/-/rollup-plugin-closure-compiler-0.27.0.tgz#fd98e7257946242cc6f3eaf8ae18d4a67a99ed40"
+  integrity sha512-stpAOn2ZZEJuAV39HFw9cnKJYNhEeHtcsoa83orpLDhSxsxSbVEKwHaWlFBaQYpQRSOdapC4eJhJnCzocZxnqg==
   dependencies:
     "@ampproject/remapping" "0.2.0"
-    acorn "7.2.0"
+    acorn "7.3.1"
     acorn-walk "7.1.1"
     estree-walker "2.0.1"
-    google-closure-compiler "20200517.0.0"
+    google-closure-compiler "20210808.0.0"
     magic-string "0.25.7"
     uuid "8.1.0"
 
@@ -290,7 +290,12 @@ acorn-walk@7.1.1, acorn-walk@^7.0.0:
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-7.1.1.tgz#345f0dffad5c735e7373d2fec9a1023e6a44b83e"
   integrity sha512-wdlPY2tm/9XBr7QkKlq0WQVgiuGTX6YWPyRyBviSoScBuLfTVQhvwg6wJ369GJ/1nPfTLMfnrFIfjqVg6d+jQQ==
 
-acorn@7.2.0, acorn@^7.1.0:
+acorn@7.3.1:
+  version "7.3.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.3.1.tgz#85010754db53c3fbaf3b9ea3e083aa5c5d147ffd"
+  integrity sha512-tLc0wSnatxAQHVHUapaHdz72pi9KUyHjq5KyHjGg9Y8Ifdc79pTh2XvI6I1/chZbnM7QtNKzh66ooDogPZSleA==
+
+acorn@^7.1.0:
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.2.0.tgz#17ea7e40d7c8640ff54a694c889c26f31704effe"
   integrity sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==
@@ -1351,46 +1356,40 @@ globals@^11.1.0:
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
   integrity sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==
 
-google-closure-compiler-java@^20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler-java/-/google-closure-compiler-java-20200517.0.0.tgz#778370c22273c9085f4cf959ce063f8f112c02ac"
-  integrity sha512-JVZBiyyXwcYi6Yc3lO6dF2hMLJA4OzPm4/mgsem/tF1vk2HsWTnL3GTaBsPB2ENVZp0hoqsd4KgpPiG9ssNWxw==
-
-google-closure-compiler-js@^20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler-js/-/google-closure-compiler-js-20200517.0.0.tgz#9cb0861f764073d1c4d3b7453b74073ccb1ecfb1"
-  integrity sha512-dz6dOUHx5nhdIqMRXacAYS8aJfLvw4IKxGg28Hq/zeeDPHlX3P3iBK20NgFDfT8zdushThymtMqChSy7C5eyfA==
+google-closure-compiler-java@^20210808.0.0:
+  version "20210808.0.0"
+  resolved "https://registry.yarnpkg.com/google-closure-compiler-java/-/google-closure-compiler-java-20210808.0.0.tgz#9722073e2ace0ed1a9934423e6277c9994418e84"
+  integrity sha512-7dEQfBzOdwdjwa/Pq8VAypNBKyWRrOcKjnNYOO9gEg2hjh8XVMeQzTqw4uANfVvvANGdE/JjD+HF6zHVgLRwjg==
 
-google-closure-compiler-linux@^20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler-linux/-/google-closure-compiler-linux-20200517.0.0.tgz#2b9ecb634130060174aff5c52329a694ea4be68b"
-  integrity sha512-S5xPh6TtP+ESzZrmQLcDDqtZAsCVTbdI4VS98wQlN6IMZTd94nAnOCg9mrxQNAgop2t4sdsv/KuH0BGPUWEZ+w==
+google-closure-compiler-linux@^20210808.0.0:
+  version "20210808.0.0"
+  resolved "https://registry.yarnpkg.com/google-closure-compiler-linux/-/google-closure-compiler-linux-20210808.0.0.tgz#42b844cef30cce6570d21f5d75c71f1af36fc070"
+  integrity sha512-byKi5ITUiWRvEIcQo76i1siVnOwrTmG+GNcBG4cJ7x8IE6+4ki9rG5pUe4+DOYHkfk52XU6XHt9aAAgCcFDKpg==
 
-google-closure-compiler-osx@^20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler-osx/-/google-closure-compiler-osx-20200517.0.0.tgz#9394e9a2fd97e3729fc3bd2abcffff6aab2cfcaa"
-  integrity sha512-FWIcsKqLllLjdOBZd7azijVaObydgRd0obVNi63eUfC5MX6T4qxKumGCyor2UCNY6by2ESz+PlGqCFzFhZ6b2g==
+google-closure-compiler-osx@^20210808.0.0:
+  version "20210808.0.0"
+  resolved "https://registry.yarnpkg.com/google-closure-compiler-osx/-/google-closure-compiler-osx-20210808.0.0.tgz#6fe601c80d19a998d2703de6bb5a8c4d41f75e24"
+  integrity sha512-iwyAY6dGj1FrrBdmfwKXkjtTGJnqe8F+9WZbfXxiBjkWLtIsJt2dD1+q7g/sw3w8mdHrGQAdxtDZP/usMwj/Rg==
 
-google-closure-compiler-windows@^20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler-windows/-/google-closure-compiler-windows-20200517.0.0.tgz#c5cdde438c29458666a83358567b12072924ed6c"
-  integrity sha512-UXhjRGwS8deTkRla/riyVq3psscgMuw78lepEPtq5NgbumgJzY2+IQP9q+4MVOfJW58Rv0JUWKAFOnBBSZWcAQ==
+google-closure-compiler-windows@^20210808.0.0:
+  version "20210808.0.0"
+  resolved "https://registry.yarnpkg.com/google-closure-compiler-windows/-/google-closure-compiler-windows-20210808.0.0.tgz#f907fa046d8a25d820485cb4482fbd5bada9cf03"
+  integrity sha512-VI+UUYwtGWDYwpiixrWRD8EklHgl6PMbiEaHxQSrQbH8PDXytwaOKqmsaH2lWYd5Y/BOZie2MzjY7F5JI69q1w==
 
-google-closure-compiler@20200517.0.0:
-  version "20200517.0.0"
-  resolved "https://registry.yarnpkg.com/google-closure-compiler/-/google-closure-compiler-20200517.0.0.tgz#6c47f99fc1be59bd4f9e23c5a8f2e66d64b54143"
-  integrity sha512-80W9zBS9Ajk1T5InWCfsoPohDmo5T1AAyw1rHh5+dgb/jPgwC65KhY+oJozTncf+/7tyQHJXozTARwhSlBUcMg==
+google-closure-compiler@20210808.0.0:
+  version "20210808.0.0"
+  resolved "https://registry.yarnpkg.com/google-closure-compiler/-/google-closure-compiler-20210808.0.0.tgz#0638e71f1073f71682277200db71d0ea05b3de1d"
+  integrity sha512-+R2+P1tT1lEnDDGk8b+WXfyVZgWjcCK9n1mmZe8pMEzPaPWxqK7GMetLVWnqfTDJ5Q+LRspOiFBv3Is+0yuhCA==
   dependencies:
     chalk "2.x"
-    google-closure-compiler-java "^20200517.0.0"
-    google-closure-compiler-js "^20200517.0.0"
+    google-closure-compiler-java "^20210808.0.0"
     minimist "1.x"
     vinyl "2.x"
     vinyl-sourcemaps-apply "^0.2.0"
   optionalDependencies:
-    google-closure-compiler-linux "^20200517.0.0"
-    google-closure-compiler-osx "^20200517.0.0"
-    google-closure-compiler-windows "^20200517.0.0"
+    google-closure-compiler-linux "^20210808.0.0"
+    google-closure-compiler-osx "^20210808.0.0"
+    google-closure-compiler-windows "^20210808.0.0"
 
 graceful-fs@^4.1.6:
   version "4.2.3"