diff --git a/package.json b/package.json
index e6771bdd..04f6fee3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arquero",
-  "version": "4.8.2",
+  "version": "4.8.3",
   "description": "Query processing and transformation of array-backed data tables.",
   "keywords": [
     "data",
@@ -37,7 +37,7 @@
     "prepublishOnly": "yarn test && yarn lint && yarn build"
   },
   "dependencies": {
-    "acorn": "^8.3.0",
+    "acorn": "^8.4.0",
     "apache-arrow": "^3.0.0",
     "node-fetch": "^2.6.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 4d6372b0..50766f22 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -115,10 +115,10 @@ acorn@^7.4.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.4.1.tgz#feaed255973d2e77555b83dbc08851a6c63520fa"
   integrity sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==
 
-acorn@^8.3.0:
-  version "8.3.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.3.0.tgz#1193f9b96c4e8232f00b11a9edff81b2c8b98b88"
-  integrity sha512-tqPKHZ5CaBJw0Xmy0ZZvLs1qTV+BNFSyvn77ASXkpBNfIRk8ev26fKrD9iLGwGA9zedPao52GSHzq8lyZG0NUw==
+acorn@^8.4.0:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.4.0.tgz#af53266e698d7cffa416714b503066a82221be60"
+  integrity sha512-ULr0LDaEqQrMFGyQ3bhJkLsbtrQ8QibAseGZeaSUiT/6zb9IvIkomWHJIvgvwad+hinRAgsI51JcWk2yvwyL+w==
 
 ajv@^6.10.0, ajv@^6.12.4:
   version "6.12.6"
@@ -1196,9 +1196,9 @@ regexp.prototype.flags@^1.3.0:
     define-properties "^1.1.3"
 
 regexpp@^3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.1.0.tgz#206d0ad0a5648cffbdb8ae46438f3dc51c9f78e2"
-  integrity sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.2.0.tgz#0425a2768d8f23bad70ca4b90461fa2f1213e1b2"
+  integrity sha512-pq2bWo9mVD43nbts2wGv17XLiNLya+GklZ8kaDLV2Z08gDCsGpnKn9BFMepvWuHCbyVvY7J5o5+BVvoQbmlJLg==
 
 repeat-string@^1.5.4:
   version "1.6.1"