diff --git a/package-lock.json b/package-lock.json
index 0a6f637..2e65a69 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,19 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@kwsites/file-exists": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@kwsites/file-exists/-/file-exists-1.1.1.tgz",
+      "integrity": "sha512-m9/5YGR18lIwxSFDwfE3oA7bWuq9kdau6ugN4H2rJeyhFQZcG9AgSHkQtSD15a8WvTgfz9aikZMrKPHvbpqFiw==",
+      "requires": {
+        "debug": "^4.1.1"
+      }
+    },
+    "@kwsites/promise-deferred": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@kwsites/promise-deferred/-/promise-deferred-1.1.1.tgz",
+      "integrity": "sha512-GaHYm+c0O9MjZRu0ongGBRbinu8gVAMd2UZjji6jVmqKtZluZnptXGWhz1E8j8D2HJ3f/yMxKAUC0b+57wncIw=="
+    },
     "@octokit/endpoint": {
       "version": "5.5.1",
       "resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-5.5.1.tgz",
@@ -269,11 +282,11 @@
       }
     },
     "debug": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
-      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
+      "integrity": "sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==",
       "requires": {
-        "ms": "^2.1.1"
+        "ms": "2.1.2"
       }
     },
     "deprecation": {
@@ -835,11 +848,13 @@
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
     },
     "simple-git": {
-      "version": "1.126.0",
-      "resolved": "https://registry.npmjs.org/simple-git/-/simple-git-1.126.0.tgz",
-      "integrity": "sha512-47mqHxgZnN8XRa9HbpWprzUv3Ooqz9RY/LSZgvA7jCkW8jcwLahMz7LKugY91KZehfG0sCVPtgXiU72hd6b1Bw==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/simple-git/-/simple-git-3.15.0.tgz",
+      "integrity": "sha512-FiWoMPlcYHQ+ApRihUsGjC/ZmIlWj62S6MBCwOunczvXcLQt+9ZdrysDrR6QVepkRQfEAaBXrN2QtJKrN6zbtg==",
       "requires": {
-        "debug": "^4.0.1"
+        "@kwsites/file-exists": "^1.1.1",
+        "@kwsites/promise-deferred": "^1.1.1",
+        "debug": "^4.3.4"
       }
     },
     "string-width": {
diff --git a/package.json b/package.json
index 4170bcb..65af046 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "lodash": "^4.17.15",
     "minimist": "^1.2.0",
     "ncp": "^2.0.0",
-    "simple-git": "^1.126.0",
+    "simple-git": "^3.15.0",
     "touch": "^3.1.0",
     "treeify": "^1.1.0"
   }