diff --git a/package.json b/package.json
index aeb37ed54d8..fe45b737a2f 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "stats": "webpack --mode production --config scripts/webpack/webpack.prod.js --profile --json > compilation-stats.json",
     "storybook": "yarn workspace @grafana/ui storybook --ci",
     "storybook:build": "yarn workspace @grafana/ui storybook:build",
-    "themes:generate": "esbuild ./scripts/cli/generateSassVariableFiles.ts --bundle --platform=node --tsconfig=./scripts/cli/tsconfig.json | node",
+    "themes:generate": "esbuild --target=es6 ./scripts/cli/generateSassVariableFiles.ts --bundle --platform=node --tsconfig=./scripts/cli/tsconfig.json | node",
     "typecheck": "tsc --noEmit && yarn run packages:typecheck",
     "plugins:build-bundled": "find plugins-bundled -name package.json -not -path '*/node_modules/*' -execdir yarn build \\;",
     "watch": "yarn start -d watch,start core:start --watchTheme",