diff --git a/extensions/ql-vscode/package-lock.json b/extensions/ql-vscode/package-lock.json
index 32295ee7b85..48d9317e5fd 100644
--- a/extensions/ql-vscode/package-lock.json
+++ b/extensions/ql-vscode/package-lock.json
@@ -11,7 +11,7 @@
       "license": "MIT",
       "dependencies": {
         "@floating-ui/react": "^0.27.18",
-        "@hpcc-js/wasm-graphviz": "^1.18.0",
+        "@hpcc-js/wasm-graphviz": "^1.21.1",
         "@octokit/plugin-retry": "^7.2.0",
         "@octokit/plugin-throttling": "^9.6.0",
         "@octokit/rest": "^22.0.1",
@@ -3496,9 +3496,9 @@
       }
     },
     "node_modules/@hpcc-js/wasm-graphviz": {
-      "version": "1.20.0",
-      "resolved": "https://registry.npmjs.org/@hpcc-js/wasm-graphviz/-/wasm-graphviz-1.20.0.tgz",
-      "integrity": "sha512-29nwKSkoKoXBHPqvimS2OmWUTojU148CFMszANgWvVOh76jbRFh1ZxXAiSzVWbtQcYFcb39T8tDEAXtUjyVlMA==",
+      "version": "1.21.1",
+      "resolved": "https://registry.npmjs.org/@hpcc-js/wasm-graphviz/-/wasm-graphviz-1.21.1.tgz",
+      "integrity": "sha512-PHwgQEbfSPblh/cV422FRNU1mD3ISErOmGP8knX+TNWeUCfrbSV4dvPJnN36D+Cg6Dm4vjtnhlt3J8cUkbAS3Q==",
       "license": "Apache-2.0"
     },
     "node_modules/@hpcc-js/wasm/node_modules/ansi-regex": {
diff --git a/extensions/ql-vscode/package.json b/extensions/ql-vscode/package.json
index 270a2d8a2b3..11891f1d7df 100644
--- a/extensions/ql-vscode/package.json
+++ b/extensions/ql-vscode/package.json
@@ -2073,7 +2073,7 @@
     "chokidar": "^3.6.0",
     "d3": "^7.9.0",
     "d3-graphviz": "^5.6.0",
-    "@hpcc-js/wasm-graphviz": "^1.18.0",
+    "@hpcc-js/wasm-graphviz": "^1.21.1",
     "fs-extra": "^11.1.1",
     "js-yaml": "^4.1.1",
     "koffi": "^2.15.1",