diff --git a/package.json b/package.json
index 1155739..d0d0549 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "eslint-plugin-import": "2.29.1",
     "eslint-plugin-jsdoc": "48.2.0",
     "http-server": "14.1.1",
-    "hysnappy": "0.2.0",
+    "hysnappy": "0.3.0",
     "typescript": "5.3.3",
     "vitest": "1.3.1"
   }
diff --git a/src/column.js b/src/column.js
index d5e2456..143dc29 100644
--- a/src/column.js
+++ b/src/column.js
@@ -182,8 +182,7 @@ export function decompressPage(compressedBytes, uncompressed_page_size, codec, c
   if (codec === 'UNCOMPRESSED') {
     page = compressedBytes
   } else if (customDecompressor) {
-    page = new Uint8Array(uncompressed_page_size)
-    customDecompressor(compressedBytes, page)
+    page = customDecompressor(compressedBytes, uncompressed_page_size)
   } else if (codec === 'SNAPPY') {
     page = new Uint8Array(uncompressed_page_size)
     snappyUncompress(compressedBytes, page)
diff --git a/src/types.d.ts b/src/types.d.ts
index 7fbedbb..8a97668 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -134,7 +134,7 @@ export type CompressionCodec =
   'LZ4_RAW'
 
 export type Compressors = {
-  [K in CompressionCodec]?: (input: Uint8Array, output: Uint8Array) => void
+  [K in CompressionCodec]?: (input: Uint8Array, outputLength: number) => Uint8Array
 }
 
 interface KeyValue {
diff --git a/test/read.test.js b/test/read.test.js
index 869a36c..93bf14e 100644
--- a/test/read.test.js
+++ b/test/read.test.js
@@ -10,9 +10,9 @@ import { fileToAsyncBuffer, fileToJson } from './helpers.js'
  * @type {Compressors}
  */
 const compressors = {
-  GZIP: (/** @type {Uint8Array} */ input, /** @type {Uint8Array} */ output) => {
+  GZIP: (/** @type {Uint8Array} */ input, /** @type {number} */ outputLength) => {
     const result = gunzipSync(input)
-    output.set(result)
+    return new Uint8Array(result.buffer, result.byteOffset, outputLength)
   },
 }