diff --git a/package-lock.json b/package-lock.json
index d2d36a32b..127edcd96 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -56,7 +56,7 @@
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         "typedoc": "^0.20.36",
         "typedoc-plugin-pages": "^1.1.0",
-        "typescript": "^4.3.2",
+        "typescript": "^4.2.4",
         "webpack": "^5.36.2",
         "webpack-cli": "^4.7.0"
       },
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+      "dev": true,
       "optional": true
     },
     "node_modules/nanomatch": {
@@ -11683,19 +11684,6 @@
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       }
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-    "node_modules/sleep": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/sleep/-/sleep-6.3.0.tgz",
-      "integrity": "sha512-+WgYl951qdUlb1iS97UvQ01pkauoBK9ML9I/CMPg41v0Ze4EyMlTgFTDDo32iYj98IYqxIjDMRd+L71lawFfpQ==",
-      "hasInstallScript": true,
-      "optional": true,
-      "dependencies": {
-        "nan": "^2.14.1"
-      },
-      "engines": {
-        "node": ">=0.8.0"
-      }
-    },
     "node_modules/slice-ansi": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-4.0.0.tgz",
@@ -12884,9 +12872,9 @@
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-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.2.tgz",
-      "integrity": "sha512-zZ4hShnmnoVnAHpVHWpTcxdv7dWP60S2FsydQLV8V5PbS3FifjWFFRiHSWpDJahly88PRyV5teTSLoq4eG7mKw==",
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.4.tgz",
+      "integrity": "sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -20831,6 +20819,7 @@
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       "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.2.tgz",
       "integrity": "sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==",
+      "dev": true,
       "optional": true
     },
     "nanomatch": {
@@ -23220,15 +23209,6 @@
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       "dev": true
     },
-    "sleep": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/sleep/-/sleep-6.3.0.tgz",
-      "integrity": "sha512-+WgYl951qdUlb1iS97UvQ01pkauoBK9ML9I/CMPg41v0Ze4EyMlTgFTDDo32iYj98IYqxIjDMRd+L71lawFfpQ==",
-      "optional": true,
-      "requires": {
-        "nan": "^2.14.1"
-      }
-    },
     "slice-ansi": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-4.0.0.tgz",
@@ -24202,9 +24182,9 @@
       }
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     "typescript": {
-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.2.tgz",
-      "integrity": "sha512-zZ4hShnmnoVnAHpVHWpTcxdv7dWP60S2FsydQLV8V5PbS3FifjWFFRiHSWpDJahly88PRyV5teTSLoq4eG7mKw==",
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.4.tgz",
+      "integrity": "sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==",
       "dev": true
     },
     "uglify-js": {
diff --git a/package.json b/package.json
index 096d1c764..baa8e07c4 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "ts-loader": "^9.2.3",
     "typedoc": "^0.20.36",
     "typedoc-plugin-pages": "^1.1.0",
-    "typescript": "^4.3.2",
+    "typescript": "^4.2.4",
     "webpack": "^5.36.2",
     "webpack-cli": "^4.7.0"
   },