diff --git a/package.json b/package.json
index 33b75fd..e1c8d69 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "rollup-plugin-typescript2": "^0.28.0",
     "rollup-plugin-terser": "^7.0.2",
     "rollup": "^2.32.0",
-    "terser": "^3.16.1",
+    "terser": "^4.8.1",
     "ts-jest": "^24.0.2",
     "ts-loader": "^6.0.2",
     "ts-node": "^8.2.0",
diff --git a/yarn.lock b/yarn.lock
index dfcee9f..0cd53bb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1309,10 +1309,6 @@ commander@^2.11.0, commander@^2.19.0, commander@^2.20.0, commander@~2.20.3:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
 
-commander@~2.17.1:
-  version "2.17.1"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
-
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -2315,10 +2311,10 @@ ignore-walk@^3.0.1:
   dependencies:
     minimatch "^3.0.4"
 
-immer@^9.0.6:
-  version "9.0.6"
-  resolved "https://registry.yarnpkg.com/immer/-/immer-9.0.6.tgz#7a96bf2674d06c8143e327cbf73539388ddf1a73"
-  integrity sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ==
+immer@^9.0.12:
+  version "9.0.15"
+  resolved "https://registry.yarnpkg.com/immer/-/immer-9.0.15.tgz#0b9169e5b1d22137aba7d43f8a81a495dd1b62dc"
+  integrity sha512-2eB/sswms9AEUSkOm4SbV5Y7Vmt/bKRwByd52jfLkW4OLYeaTP3EEiJ9agqU0O/tq6Dk62Zfj+TJSqfm1rLVGQ==
 
 import-local@^2.0.0:
   version "2.0.0"
@@ -4515,14 +4511,7 @@ source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-source-map-support@^0.5.6, source-map-support@~0.5.9:
-  version "0.5.10"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.10.tgz#2214080bc9d51832511ee2bab96e3c2f9353120c"
-  dependencies:
-    buffer-from "^1.0.0"
-    source-map "^0.6.0"
-
-source-map-support@~0.5.12, source-map-support@~0.5.19:
+source-map-support@^0.5.6, source-map-support@~0.5.12, source-map-support@~0.5.19:
   version "0.5.19"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
   integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
@@ -4783,18 +4772,10 @@ terser-webpack-plugin@^1.4.3:
     webpack-sources "^1.4.0"
     worker-farm "^1.7.0"
 
-terser@^3.16.1:
-  version "3.16.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-3.16.1.tgz#5b0dd4fa1ffd0b0b43c2493b2c364fd179160493"
-  dependencies:
-    commander "~2.17.1"
-    source-map "~0.6.1"
-    source-map-support "~0.5.9"
-
-terser@^4.1.2:
-  version "4.8.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.0.tgz#63056343d7c70bb29f3af665865a46fe03a0df17"
-  integrity sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==
+terser@^4.1.2, terser@^4.8.1:
+  version "4.8.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.1.tgz#a00e5634562de2239fd404c649051bf6fc21144f"
+  integrity sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"