diff --git a/Justfile b/Justfile
index 9b6c4924..a6cdb625 100644
--- a/Justfile
+++ b/Justfile
@@ -104,7 +104,8 @@ js:
 	{{ESBUILD}} ./src/Javascript/Brain/index.ts \
 		--outdir={{BUILD_DIR}}/js/brain/ \
 		--splitting \
-		--alias:brain.elm.js={{BUILD_DIR}}/js/brain.elm.js
+		--alias:brain.elm.js={{BUILD_DIR}}/js/brain.elm.js \
+		--inject:./system/Js/node-shims.js
 
 	# Main
 	{{ESBUILD}} ./src/Javascript/index.ts \
@@ -132,7 +133,8 @@ js-prod:
 		--outdir={{BUILD_DIR}}/js/brain/ \
 		--splitting \
 		--minify \
-		--alias:brain.elm.js={{BUILD_DIR}}/js/brain.elm.js
+		--alias:brain.elm.js={{BUILD_DIR}}/js/brain.elm.js \
+		--inject:./system/Js/node-shims.js
 
 	# Main
 	{{ESBUILD}} ./src/Javascript/index.ts \
diff --git a/src/Javascript/processing.ts b/src/Javascript/processing.ts
index 48aa8346..e4e0b1c2 100644
--- a/src/Javascript/processing.ts
+++ b/src/Javascript/processing.ts
@@ -78,8 +78,11 @@ export function getTags(headUrl, getUrl, filename, options) {
 
       tokenizer.fileInfo.mimeType = fileMime
       tokenizer.fileInfo.url = getUrl
-      tokenizer.rangeRequestClient.url = getUrl
-      tokenizer.rangeRequestClient.resolvedUrl = undefined
+
+      if (tokenizer.rangeRequestClient) {
+        tokenizer.rangeRequestClient.url = getUrl
+        tokenizer.rangeRequestClient.resolvedUrl = undefined
+      }
 
       return musicMetadata.parseFromTokenizer(
         tokenizer,
diff --git a/system/Js/node-shims.js b/system/Js/node-shims.js
new file mode 100644
index 00000000..41a0baf0
--- /dev/null
+++ b/system/Js/node-shims.js
@@ -0,0 +1,10 @@
+import BufferPolyfill from "buffer/"
+
+export let Buffer = BufferPolyfill.Buffer
+export let global = globalThis
+export let process = { env: { NODE_DEBUG: false } }
+export let localStorage = globalThis.localStorage || {
+  getItem: () => null,
+  setItem: () => null,
+  removeItem: () => null
+}