diff --git a/packages/ani-cursor/CHANGELOG.md b/packages/ani-cursor/CHANGELOG.md
index 3e4e7a36..b97f3d56 100644
--- a/packages/ani-cursor/CHANGELOG.md
+++ b/packages/ani-cursor/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog for `ani-cursor`
 
+## Next (unreleased)
+
+### Bug Fixes
+
+* Prevent "Maximum call stack size exceeded" error when parsing large cursors.
+
 ## 0.0.5
 
 ### Bug Fixes
diff --git a/packages/ani-cursor/src/index.ts b/packages/ani-cursor/src/index.ts
index a1f5393e..4fc472ca 100644
--- a/packages/ani-cursor/src/index.ts
+++ b/packages/ani-cursor/src/index.ts
@@ -79,8 +79,12 @@ function readAni(contents: Uint8Array): AniCursorImage {
 let i = 0;
 const uniqueId = () => i++;
 
-function base64FromDataArray(dataArray: Uint8Array): string {
-  return window.btoa(String.fromCharCode(...dataArray));
+export function base64FromDataArray(dataArray: Uint8Array): string {
+  return window.btoa(
+    Array.from(dataArray)
+      .map((byte) => String.fromCharCode(byte))
+      .join("")
+  );
 }
 
 function curUrlFromByteArray(arr: Uint8Array) {
diff --git a/packages/webamp/CHANGELOG.md b/packages/webamp/CHANGELOG.md
index 58683693..ee17447b 100644
--- a/packages/webamp/CHANGELOG.md
+++ b/packages/webamp/CHANGELOG.md
@@ -9,6 +9,7 @@
 - Fix a number of edge cases where the close and minimize buttons in the equalizer window could render the wrong sprite [#1046](https://github.com/captbaritone/webamp/pull/1046)
 - Fix a bug where unminified bundle was accidentally minified.
 - Treat skin files with forward slashes in their filename as directories [#1052](https://github.com/captbaritone/webamp/pull/1052)
+- Prevent "Maximum call stack size exceeded" error when parsing large cursors.
 
 ## 1.4.2
 
diff --git a/packages/webamp/js/utils.ts b/packages/webamp/js/utils.ts
index 9027640c..bbaff5ce 100644
--- a/packages/webamp/js/utils.ts
+++ b/packages/webamp/js/utils.ts
@@ -132,9 +132,13 @@ export const clamp = (value: number, min: number, max: number): number =>
 export const sum = (values: number[]): number =>
   values.reduce((total, value) => total + value, 0);
 
-export const base64FromDataArray = (dataArray: Uint8Array): string => {
-  return window.btoa(String.fromCharCode(...dataArray));
-};
+export function base64FromDataArray(dataArray: Uint8Array): string {
+  return window.btoa(
+    Array.from(dataArray)
+      .map((byte) => String.fromCharCode(byte))
+      .join("")
+  );
+}
 
 export const base64FromArrayBuffer = (arrayBuffer: ArrayBuffer): string => {
   return base64FromDataArray(new Uint8Array(arrayBuffer));