diff --git a/.esbuild/esbuild.cjs b/.esbuild/esbuild.cjs
index 776ae6eec..affd08ef9 100644
--- a/.esbuild/esbuild.cjs
+++ b/.esbuild/esbuild.cjs
@@ -1,4 +1,4 @@
-const { esmBuild, umdBuild } = require('./util.cjs');
+const { esmBuild, iifeBuild } = require('./util.cjs');
 const { build } = require('esbuild');
 
 const handler = (e) => {
@@ -8,14 +8,14 @@ const handler = (e) => {
 const watch = process.argv.includes('--watch');
 
 // mermaid.js
-build(umdBuild({ minify: false, watch })).catch(handler);
+build(iifeBuild({ minify: false, watch })).catch(handler);
 // mermaid.esm.mjs
 build(esmBuild({ minify: false, watch })).catch(handler);
 
 // mermaid.core.js
-build(umdBuild({ minify: false, core: true })).catch(handler);
+build(iifeBuild({ minify: false, core: true })).catch(handler);
 
 // mermaid.min.js
 build(esmBuild()).catch(handler);
 // mermaid.esm.min.mjs
-build(umdBuild()).catch(handler);
+build(iifeBuild()).catch(handler);
diff --git a/.esbuild/serve.cjs b/.esbuild/serve.cjs
index 13eba401d..c54ff1e9f 100644
--- a/.esbuild/serve.cjs
+++ b/.esbuild/serve.cjs
@@ -1,7 +1,7 @@
 const esbuild = require('esbuild');
 const http = require('http');
 const path = require('path');
-const { umdBuild } = require('./util.cjs');
+const { iifeBuild } = require('./util.cjs');
 
 // Start esbuild's server on a random local port
 esbuild
@@ -9,7 +9,7 @@ esbuild
     {
       servedir: path.join(__dirname, '..'),
     },
-    umdBuild({ minify: false })
+    iifeBuild({ minify: false })
   )
   .then((result) => {
     // The result tells us where esbuild's local server is
diff --git a/.esbuild/util.cjs b/.esbuild/util.cjs
index 518bb723f..e136ff52e 100644
--- a/.esbuild/util.cjs
+++ b/.esbuild/util.cjs
@@ -42,7 +42,7 @@ exports.esmBuild = (override = { minify: true }) => {
  * @param {Options & { core?: boolean }} override
  * @returns {Options}
  */
-exports.umdBuild = (override = { minify: true, core: false }) => {
+exports.iifeBuild = (override = { minify: true, core: false }) => {
   const core = override.core;
   if (core && override.minify) {
     throw new Error('Cannot minify core build');