diff --git a/package-lock.json b/package-lock.json
index 09474db..1002e30 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2569,6 +2569,23 @@
         "vinyl-sourcemaps-apply": "^0.2.1"
       },
       "dependencies": {
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        },
+        "terser": {
+          "version": "3.17.0",
+          "resolved": "https://registry.npmjs.org/terser/-/terser-3.17.0.tgz",
+          "integrity": "sha512-/FQzzPJmCpjAH9Xvk2paiWrFq+5M6aVOf+2KRbwhByISDX/EujxsK+BAvrhb6H+2rtrLCHK9N01wO014vrIwVQ==",
+          "dev": true,
+          "requires": {
+            "commander": "^2.19.0",
+            "source-map": "~0.6.1",
+            "source-map-support": "~0.5.10"
+          }
+        },
         "through2": {
           "version": "3.0.1",
           "resolved": "https://registry.npmjs.org/through2/-/through2-3.0.1.tgz",
@@ -8518,9 +8535,9 @@
       }
     },
     "source-map-support": {
-      "version": "0.5.12",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.12.tgz",
-      "integrity": "sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==",
+      "version": "0.5.21",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.21.tgz",
+      "integrity": "sha512-uBHU3L3czsIyYXKX88fdrGovxdSCoTGDRZ6SYXtSRxLZUzHg5P/66Ht6uoUlHu9EZod+inXhKo3qQgwXUT/y1w==",
       "dev": true,
       "requires": {
         "buffer-from": "^1.0.0",
@@ -8835,14 +8852,14 @@
       }
     },
     "terser": {
-      "version": "3.17.0",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-3.17.0.tgz",
-      "integrity": "sha512-/FQzzPJmCpjAH9Xvk2paiWrFq+5M6aVOf+2KRbwhByISDX/EujxsK+BAvrhb6H+2rtrLCHK9N01wO014vrIwVQ==",
+      "version": "4.8.1",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.1.tgz",
+      "integrity": "sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==",
       "dev": true,
       "requires": {
-        "commander": "^2.19.0",
+        "commander": "^2.20.0",
         "source-map": "~0.6.1",
-        "source-map-support": "~0.5.10"
+        "source-map-support": "~0.5.12"
       },
       "dependencies": {
         "source-map": {
diff --git a/package.json b/package.json
index 221f600..52533ee 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,6 @@
         "nib": "^1.1.2",
         "npm": "^6.8.0",
         "rupture": "^0.7.1",
-        "terser": "^3.17.0"
+        "terser": "^4.8.1"
     }
 }