diff --git a/package.json b/package.json
index c3306158..dc7611fe 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "postcss-cli": "7.1.2",
     "rollup": "2.26.11",
     "rollup-plugin-svelte": "5.2.3",
-    "rollup-plugin-terser": "6.1.0",
+    "rollup-plugin-terser": "7.0.2",
     "sapper": "0.28.6",
     "svelte": "3.24.1",
     "svelte-jester": "1.1.5",
diff --git a/yarn.lock b/yarn.lock
index d00bf580..ef1de53e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -110,7 +110,7 @@
     io-ts "^2.1.2"
     tslib "2.0.1"
 
-"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.1", "@babel/code-frame@^7.8.3":
+"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.10.1.tgz#d5481c5095daa1c57e16e54c6f9198443afb49ff"
   integrity sha512-IGhtTmpjGbYzcEDOw7DcQtbQSXcG9ftmAXtWTu9V936vDye4xjjekktFAtgZsWpzTj/X01jocB46mTywm/4SZw==
@@ -5572,15 +5572,7 @@ jest-watcher@^26.3.0:
     jest-util "^26.3.0"
     string-length "^4.0.1"
 
-jest-worker@^26.0.0:
-  version "26.0.0"
-  resolved "https://registry.yarnpkg.com/jest-worker/-/jest-worker-26.0.0.tgz#4920c7714f0a96c6412464718d0c58a3df3fb066"
-  integrity sha512-pPaYa2+JnwmiZjK9x7p9BoZht+47ecFCDFA/CJxspHzeDvQcfVBLWzCiWyo+EGrSiQMWZtCFo9iSvMZnAAo8vw==
-  dependencies:
-    merge-stream "^2.0.0"
-    supports-color "^7.0.0"
-
-jest-worker@^26.3.0:
+jest-worker@^26.2.1, jest-worker@^26.3.0:
   version "26.3.0"
   resolved "https://registry.yarnpkg.com/jest-worker/-/jest-worker-26.3.0.tgz#7c8a97e4f4364b4f05ed8bca8ca0c24de091871f"
   integrity sha512-Vmpn2F6IASefL+DVBhPzI2J9/GJUsqzomdeN+P+dK8/jKxbh8R3BtFnx3FIta7wYlPU62cpJMJQo4kuOowcMnw==
@@ -7453,15 +7445,15 @@ rollup-plugin-svelte@5.2.3:
     rollup-pluginutils "^2.8.2"
     sourcemap-codec "^1.4.8"
 
-rollup-plugin-terser@6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-terser/-/rollup-plugin-terser-6.1.0.tgz#071866585aea104bfbb9dd1019ac523e63c81e45"
-  integrity sha512-4fB3M9nuoWxrwm39habpd4hvrbrde2W2GG4zEGPQg1YITNkM3Tqur5jSuXlWNzbv/2aMLJ+dZJaySc3GCD8oDw==
+rollup-plugin-terser@7.0.2:
+  version "7.0.2"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-terser/-/rollup-plugin-terser-7.0.2.tgz#e8fbba4869981b2dc35ae7e8a502d5c6c04d324d"
+  integrity sha512-w3iIaU4OxcF52UUXiZNsNeuXIMDvFrr+ZXK6bFZ0Q60qyVfq4uLptoS4bbq3paG3x216eQllFZX7zt6TIImguQ==
   dependencies:
-    "@babel/code-frame" "^7.8.3"
-    jest-worker "^26.0.0"
-    serialize-javascript "^3.0.0"
-    terser "^4.7.0"
+    "@babel/code-frame" "^7.10.4"
+    jest-worker "^26.2.1"
+    serialize-javascript "^4.0.0"
+    terser "^5.0.0"
 
 rollup-pluginutils@^2.8.2:
   version "2.8.2"
@@ -7592,10 +7584,10 @@ semver@^6.0.0, semver@^6.3.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
-serialize-javascript@^3.0.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-3.1.0.tgz#8bf3a9170712664ef2561b44b691eafe399214ea"
-  integrity sha512-JIJT1DGiWmIKhzRsG91aS6Ze4sFUrYbltlkg2onR5OrnNM02Kl/hnY/T4FN2omvyeBbQmMJv+K4cPOpGzOTFBg==
+serialize-javascript@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-4.0.0.tgz#b525e1238489a5ecfc42afacc3fe99e666f4b1aa"
+  integrity sha512-GaNA54380uFefWghODBWEGisLZFj00nS5ACs6yHa9nLqlLpVLO8ChDGeKRjZnV4Nh4n0Qi7nhYZD/9fCPzEqkw==
   dependencies:
     randombytes "^2.1.0"
 
@@ -8197,10 +8189,10 @@ terminal-link@^2.0.0, terminal-link@^2.1.1:
     ansi-escapes "^4.2.1"
     supports-hyperlinks "^2.0.0"
 
-terser@^4.7.0:
-  version "4.7.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.7.0.tgz#15852cf1a08e3256a80428e865a2fa893ffba006"
-  integrity sha512-Lfb0RiZcjRDXCC3OSHJpEkxJ9Qeqs6mp2v4jf2MHfy8vGERmVDuvjXdd/EnP5Deme5F2yBRBymKmKHCBg2echw==
+terser@^5.0.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.3.0.tgz#c481f4afecdcc182d5e2bdd2ff2dc61555161e81"
+  integrity sha512-XTT3D3AwxC54KywJijmY2mxZ8nJiEjBHVYzq8l9OaYuRFWeQNBwvipuzzYEP4e+/AVcd1hqG/CqgsdIRyT45Fg==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"