diff --git a/package.json b/package.json
index 7ae4b42..cb1796f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pico-api-docs",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "description": "PICO SulTeng API Documentation - COVID-19 Sulawesi Tengah Data API",
   "main": "index.js",
   "scripts": {
diff --git a/src/lib/prism-global.ts b/src/lib/prism-global.ts
new file mode 100644
index 0000000..93d0aa2
--- /dev/null
+++ b/src/lib/prism-global.ts
@@ -0,0 +1,8 @@
+import Prism from 'prismjs'
+
+// The language grammars in prismjs/components call a global `Prism`. Publish it in its own
+// module so it exists before any grammar loads. The bundler does not guarantee that order
+// for a side-effect import, and the production build failed with "Prism is not defined".
+;(globalThis as { Prism?: typeof Prism }).Prism = Prism
+
+export default Prism
diff --git a/src/lib/prism-setup.ts b/src/lib/prism-setup.ts
index a42ce7f..89819f7 100644
--- a/src/lib/prism-setup.ts
+++ b/src/lib/prism-setup.ts
@@ -1,7 +1,7 @@
-import Prism from 'prismjs'
+import Prism from './prism-global'
 
 // Grammars register on the Prism singleton, so they must live in this one file
-// (and one chunk) with the core. Only the languages the docs show are loaded.
+// (and one chunk) with the core. prism-global publishes window.Prism first. Only the languages the docs show are loaded.
 import 'prismjs/components/prism-bash'
 import 'prismjs/components/prism-json'
 import 'prismjs/components/prism-python'