diff --git a/packages/backend/package.json b/packages/backend/package.json
index fe8c078a03..b021f3f402 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -47,7 +47,7 @@
 		"aws-sdk": "2.1413.0",
 		"axios": "^1.4.0",
 		"bcryptjs": "2.4.3",
-		"blurhash": "2.0.5",
+		"blurhash-as": "^0.10.0",
 		"bull": "4.10.4",
 		"cacheable-lookup": "7.0.0",
 		"calckey-js": "workspace:*",
diff --git a/packages/backend/src/misc/get-file-info.ts b/packages/backend/src/misc/get-file-info.ts
index 76964890e7..8cc24026d6 100644
--- a/packages/backend/src/misc/get-file-info.ts
+++ b/packages/backend/src/misc/get-file-info.ts
@@ -10,11 +10,12 @@ import FFmpeg from "fluent-ffmpeg";
 import isSvg from "is-svg";
 import { type predictionType } from "nsfwjs";
 import sharp from "sharp";
-import { encode } from "blurhash";
+import * as blurhash from "blurhash-as";
 import { detectSensitive } from "@/services/detect-sensitive.js";
 import { createTempDir } from "./create-temp.js";
 
 const pipeline = util.promisify(stream.pipeline);
+blurhash.init();
 
 export type FileInfo = {
 	size: number;
@@ -432,7 +433,13 @@ function getBlurhash(path: string): Promise<string> {
 				let hash;
 
 				try {
-					hash = encode(new Uint8ClampedArray(buffer), width, height, 7, 7);
+					hash = blurhash.encode(
+						new Uint8ClampedArray(buffer),
+						width,
+						height,
+						7,
+						7,
+					);
 				} catch (e) {
 					return reject(e);
 				}
diff --git a/packages/client/package.json b/packages/client/package.json
index 95fb9f9b2a..014f2f6464 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -30,6 +30,7 @@
 		"autobind-decorator": "2.4.0",
 		"autosize": "5.0.2",
 		"blurhash": "2.0.5",
+		"blurhash-as": "^0.10.0",
 		"broadcast-channel": "5.1.0",
 		"browser-image-resizer": "github:misskey-dev/browser-image-resizer",
 		"calckey-js": "workspace:*",
diff --git a/packages/client/src/components/MkImgWithBlurhash.vue b/packages/client/src/components/MkImgWithBlurhash.vue
index 5a0cefec2c..06f7b56a97 100644
--- a/packages/client/src/components/MkImgWithBlurhash.vue
+++ b/packages/client/src/components/MkImgWithBlurhash.vue
@@ -4,12 +4,12 @@
 		ref="canvas"
 		:width="size"
 		:height="size"
-		:title="title"
+		:title="title ?? ''"
 	/>
 	<img
 		v-if="src"
 		:src="src"
-		:title="title"
+		:title="title ?? ''"
 		:type="type"
 		:alt="alt"
 		:class="{ cover }"
@@ -21,7 +21,8 @@
 
 <script lang="ts" setup>
 import { onMounted } from "vue";
-import { decodeBlurHash } from "fast-blurhash";
+import * as blurhash from "blurhash-as/browser";
+import wasmURL from "blurhash-as/build/optimized.wasm?url";
 
 const props = withDefaults(
 	defineProps<{
@@ -46,9 +47,10 @@ const props = withDefaults(
 const canvas = $ref<HTMLCanvasElement>();
 let loaded = $ref(false);
 
-function draw() {
+async function draw() {
 	if (props.hash == null || canvas == null) return;
-	const pixels = decodeBlurHash(props.hash, props.size, props.size);
+	blurhash.setURL(wasmURL);
+	const pixels = await blurhash.decode(props.hash, props.size, props.size);
 	const ctx = canvas.getContext("2d");
 	const imageData = ctx!.createImageData(props.size, props.size);
 	imageData.data.set(pixels);
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index adead9c6f5..15f08733f7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -147,9 +147,9 @@ importers:
       bcryptjs:
         specifier: 2.4.3
         version: 2.4.3
-      blurhash:
-        specifier: 2.0.5
-        version: 2.0.5
+      blurhash-as:
+        specifier: ^0.10.0
+        version: 0.10.0
       bull:
         specifier: 4.10.4
         version: 4.10.4
@@ -736,6 +736,9 @@ importers:
       blurhash:
         specifier: 2.0.5
         version: 2.0.5
+      blurhash-as:
+        specifier: ^0.10.0
+        version: 0.10.0
       broadcast-channel:
         specifier: 5.1.0
         version: 5.1.0
@@ -780,7 +783,7 @@ importers:
         version: 2.30.0
       emojilib:
         specifier: github:thatonecalculator/emojilib
-        version: github.com/thatonecalculator/emojilib/1d6adc1af8105b4937d2f0e7479acf5bd565bd9b
+        version: github.com/thatonecalculator/emojilib/d3c8c6a77d4362b3b3180099f1d2eac344ce245c
       escape-regexp:
         specifier: 0.0.1
         version: 0.0.1
@@ -1078,6 +1081,9 @@ packages:
       '@jridgewell/gen-mapping': 0.3.3
       '@jridgewell/trace-mapping': 0.3.18
 
+  /@assemblyscript/loader@0.27.5:
+    resolution: {integrity: sha512-DGEJQIKh/pMseal4i26haGutxNfs3nGzwY0MNseoFKcE3DKIXQ25deWpNOqIJQPvjS4FKH+oUpzsTv0oa17+xg==}
+
   /@babel/code-frame@7.22.5:
     resolution: {integrity: sha512-Xmwn266vad+6DAqEB2A6V/CcZVp62BbwVmcOJc2RPuwih1kw02TjQvWVWlcKGbBPd+8/0V5DEkOcizRGYsspYQ==}
     engines: {node: '>=6.9.0'}
@@ -5411,8 +5417,15 @@ packages:
     resolution: {integrity: sha512-DRQrD6gJyy8FbiE4s+bDoXS9hiW3Vbx5uCdwvcCf3zLHL+Iv7LtGHLpr+GZV8rHG8tK766FGYBwRbu8pELTt+w==}
     dev: true
 
+  /blurhash-as@0.10.0:
+    resolution: {integrity: sha512-0xkq5uhvdQZfbytKAPtuy3vkkGdsZJxxqL3l6lWIgTIoEdH85jU/0HRENFDH5AW3MwChc6CnfXB4RUvvoRbJeA==}
+    engines: {node: '>=10'}
+    dependencies:
+      '@assemblyscript/loader': 0.27.5
+
   /blurhash@2.0.5:
     resolution: {integrity: sha512-cRygWd7kGBQO3VEhPiTgq4Wc43ctsM+o46urrmPOiuAe+07fzlSB9OJVdpgDL0jPqXUVQ9ht7aq7kxOeJHRK+w==}
+    dev: true
 
   /bmp-js@0.1.0:
     resolution: {integrity: sha512-vHdS19CnY3hwiNdkaqk93DvjVLfbEcI8mys4UjuWrlX1haDmroo8o4xCzh4wD6DGV6HxRCyauwhHRqMTfERtjw==}
@@ -17486,8 +17499,8 @@ packages:
       url-polyfill: 1.1.12
     dev: true
 
-  github.com/thatonecalculator/emojilib/1d6adc1af8105b4937d2f0e7479acf5bd565bd9b:
-    resolution: {tarball: https://codeload.github.com/thatonecalculator/emojilib/tar.gz/1d6adc1af8105b4937d2f0e7479acf5bd565bd9b}
+  github.com/thatonecalculator/emojilib/d3c8c6a77d4362b3b3180099f1d2eac344ce245c:
+    resolution: {tarball: https://codeload.github.com/thatonecalculator/emojilib/tar.gz/d3c8c6a77d4362b3b3180099f1d2eac344ce245c}
     name: emojilib
     version: 3.0.10
     dev: true