diff --git a/src/pages/advanced.tsx b/src/pages/advanced.tsx
index 0e5185b..f932b99 100644
--- a/src/pages/advanced.tsx
+++ b/src/pages/advanced.tsx
@@ -53,8 +53,9 @@ export default function Page() {
 
       // select the first valid buffer size for the newly selected depth
       setBufferSize(
-        ALL_DEPTH_SIZE_PAIRS.find((pair) => pair.maxDepth == maxDepth)
-          ?.maxBufferSize as ValidDepthSizePair["maxBufferSize"],
+        ALL_DEPTH_SIZE_PAIRS.find(
+          (pair) => pair.maxDepth == parseInt(e.target.value),
+        )?.maxBufferSize as ValidDepthSizePair["maxBufferSize"],
       );
     },
     [],