diff --git a/package.json b/package.json
index 21211a83..d19db679 100644
--- a/package.json
+++ b/package.json
@@ -37,28 +37,28 @@
     "markdown-it": "11.0.0"
   },
   "devDependencies": {
-    "@types/node": "~13.11.1",
-    "browserify": "~16.5.1",
-    "c8": "~7.1.2",
-    "cpy-cli": "~3.1.0",
-    "eslint": "~6.8.0",
-    "eslint-plugin-jsdoc": "~22.1.0",
-    "globby": "~11.0.0",
-    "js-yaml": "~3.13.1",
+    "@types/node": "~14.6.4",
+    "browserify": "~16.5.2",
+    "c8": "~7.3.0",
+    "cpy-cli": "~3.1.1",
+    "eslint": "~7.8.1",
+    "eslint-plugin-jsdoc": "~30.3.1",
+    "globby": "~11.0.1",
+    "js-yaml": "~3.14.0",
     "make-dir-cli": "~2.0.0",
     "markdown-it-for-inline": "~0.1.1",
     "@iktakahiro/markdown-it-katex": "~4.0.0",
     "markdown-it-sub": "~1.0.0",
     "markdown-it-sup": "~1.0.0",
-    "markdownlint-rule-helpers": "~0.7.0",
+    "markdownlint-rule-helpers": "~0.11.0",
     "rimraf": "~3.0.2",
-    "strip-json-comments": "~3.1.0",
+    "strip-json-comments": "~3.1.1",
     "tape": "~4.13.2",
-    "tape-player": "~0.1.0",
+    "tape-player": "~0.1.1",
     "toml": "~3.0.0",
     "tv4": "~1.3.0",
-    "typescript": "~3.8.3",
-    "uglify-js": "~3.8.1"
+    "typescript": "~4.0.2",
+    "uglify-js": "~3.10.3"
   },
   "keywords": [
     "markdown",