diff --git a/package-lock.json b/package-lock.json
index c6d3d67..1971db8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,7 +1,7 @@
 {
   "name": "@actions/artifact",
   "version": "2.0.0",
-  "lockfileVersion": 2,
+  "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
@@ -13,7 +13,8 @@
         "@actions/http-client": "^2.1.0"
       },
       "devDependencies": {
-        "typescript": "^3.9.10"
+        "@types/tmp": "^0.2.1",
+        "typescript": "^4.3.0"
       }
     },
     "node_modules/@actions/core": {
@@ -33,6 +34,12 @@
         "tunnel": "^0.0.6"
       }
     },
+    "node_modules/@types/tmp": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/@types/tmp/-/tmp-0.2.3.tgz",
+      "integrity": "sha512-dDZH/tXzwjutnuk4UacGgFRwV+JSLaXL1ikvidfJprkb7L9Nx1njcRHHmi3Dsvt7pgqqTEeucQuOrWHPFgzVHA==",
+      "dev": true
+    },
     "node_modules/tunnel": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
@@ -42,9 +49,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "3.9.10",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
-      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -62,40 +69,5 @@
         "uuid": "dist/bin/uuid"
       }
     }
-  },
-  "dependencies": {
-    "@actions/core": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.10.0.tgz",
-      "integrity": "sha512-2aZDDa3zrrZbP5ZYg159sNoLRb61nQ7awl5pSvIq5Qpj81vwDzdMRKzkWJGJuwVvWpvZKx7vspJALyvaaIQyug==",
-      "requires": {
-        "@actions/http-client": "^2.0.1",
-        "uuid": "^8.3.2"
-      }
-    },
-    "@actions/http-client": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-2.1.0.tgz",
-      "integrity": "sha512-BonhODnXr3amchh4qkmjPMUO8mFi/zLaaCeCAJZqch8iQqyDnVIkySjB38VHAC8IJ+bnlgfOqlhpyCUZHlQsqw==",
-      "requires": {
-        "tunnel": "^0.0.6"
-      }
-    },
-    "tunnel": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
-      "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg=="
-    },
-    "typescript": {
-      "version": "3.9.10",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
-      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
-      "dev": true
-    },
-    "uuid": {
-      "version": "8.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
-      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
-    }
   }
 }
diff --git a/package.json b/package.json
index 6b613ec..144063c 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,9 @@
   "scripts": {
     "audit-moderate": "npm install && npm audit --json --audit-level=moderate > audit.json",
     "test": "echo \"Error: run tests from root\" && exit 1",
-    "tsc": "tsc"
+    "bootstrap": "cd ../../ && npm run bootstrap",
+    "tsc-run": "tsc",
+    "tsc": "npm run bootstrap && npm run tsc-run"
   },
   "bugs": {
     "url": "https://github.com/actions/toolkit/issues"
@@ -41,6 +43,7 @@
     "@actions/http-client": "^2.1.0"
   },
   "devDependencies": {
-    "typescript": "^3.9.10"
+    "@types/tmp": "^0.2.1",
+    "typescript": "^4.3.0"
   }
-}
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index a8b812a..9e3ac43 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,16 @@
   "compilerOptions": {
     "baseUrl": "./",
     "outDir": "./lib",
-    "rootDir": "./src"
+    "rootDir": "./src",
+    "paths": {
+      "@actions/core": [
+        "../core"
+      ],
+      "@actions/http-client": [
+        "../http-client"
+      ]
+    },
+    "useUnknownInCatchVariables": false
   },
   "include": [
     "./src"