diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b337e0bd..cd683859 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -291,7 +291,7 @@ jobs:
     needs: lint
     name: "build-wasm32 [package]"
     runs-on: ubuntu-24.04
-    container: "emscripten/emsdk:4.0.14"
+    container: "emscripten/emsdk:4.0.18"
     steps:
       - uses: actions/checkout@v4
       - name: Dependencies
diff --git a/biome.json b/biome.json
index 2a79d5ed..a7d41490 100644
--- a/biome.json
+++ b/biome.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.2.6/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.3.2/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
diff --git a/docs/src/content/docs/changelog/v0.34.5.md b/docs/src/content/docs/changelog/v0.34.5.md
index 0c4a936a..8cfca9c9 100644
--- a/docs/src/content/docs/changelog/v0.34.5.md
+++ b/docs/src/content/docs/changelog/v0.34.5.md
@@ -3,6 +3,8 @@ title: v0.34.5 - TBD
 slug: changelog/v0.34.5
 ---
 
+* Upgrade to libvips v8.17.3 for upstream bug fixes.
+
 * Add experimental support for prebuilt Linux RISC-V 64-bit binaries.
 
 * Support building from source with npm v12+, deprecate `--build-from-source` flag.
diff --git a/npm/darwin-arm64/package.json b/npm/darwin-arm64/package.json
index da5ee34b..f056b3bd 100644
--- a/npm/darwin-arm64/package.json
+++ b/npm/darwin-arm64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-darwin-arm64": "1.2.3"
+    "@img/sharp-libvips-darwin-arm64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/darwin-x64/package.json b/npm/darwin-x64/package.json
index 835d80a0..cdf02fe0 100644
--- a/npm/darwin-x64/package.json
+++ b/npm/darwin-x64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-darwin-x64": "1.2.3"
+    "@img/sharp-libvips-darwin-x64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-arm/package.json b/npm/linux-arm/package.json
index 4872f357..d32dc06b 100644
--- a/npm/linux-arm/package.json
+++ b/npm/linux-arm/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-arm": "1.2.3"
+    "@img/sharp-libvips-linux-arm": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-arm64/package.json b/npm/linux-arm64/package.json
index 32076414..bd2c4587 100644
--- a/npm/linux-arm64/package.json
+++ b/npm/linux-arm64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-arm64": "1.2.3"
+    "@img/sharp-libvips-linux-arm64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-ppc64/package.json b/npm/linux-ppc64/package.json
index 7db2e1e7..8a2e183c 100644
--- a/npm/linux-ppc64/package.json
+++ b/npm/linux-ppc64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-ppc64": "1.2.3"
+    "@img/sharp-libvips-linux-ppc64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-riscv64/package.json b/npm/linux-riscv64/package.json
index dc367735..076d2cdf 100644
--- a/npm/linux-riscv64/package.json
+++ b/npm/linux-riscv64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-riscv64": "1.2.3"
+    "@img/sharp-libvips-linux-riscv64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-s390x/package.json b/npm/linux-s390x/package.json
index ff0f657d..6ba8a455 100644
--- a/npm/linux-s390x/package.json
+++ b/npm/linux-s390x/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-s390x": "1.2.3"
+    "@img/sharp-libvips-linux-s390x": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linux-x64/package.json b/npm/linux-x64/package.json
index 20996aab..e613ddfa 100644
--- a/npm/linux-x64/package.json
+++ b/npm/linux-x64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-x64": "1.2.3"
+    "@img/sharp-libvips-linux-x64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linuxmusl-arm64/package.json b/npm/linuxmusl-arm64/package.json
index da27e8ad..3ab8537e 100644
--- a/npm/linuxmusl-arm64/package.json
+++ b/npm/linuxmusl-arm64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linuxmusl-arm64": "1.2.3"
+    "@img/sharp-libvips-linuxmusl-arm64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/linuxmusl-x64/package.json b/npm/linuxmusl-x64/package.json
index 3d218061..83f7027d 100644
--- a/npm/linuxmusl-x64/package.json
+++ b/npm/linuxmusl-x64/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linuxmusl-x64": "1.2.3"
+    "@img/sharp-libvips-linuxmusl-x64": "1.2.4"
   },
   "files": [
     "lib"
diff --git a/npm/wasm32/package.json b/npm/wasm32/package.json
index f6a40247..f4fc25fd 100644
--- a/npm/wasm32/package.json
+++ b/npm/wasm32/package.json
@@ -31,7 +31,7 @@
     "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
   },
   "dependencies": {
-    "@emnapi/runtime": "^1.5.0"
+    "@emnapi/runtime": "^1.6.0"
   },
   "cpu": [
     "wasm32"
diff --git a/package.json b/package.json
index 3f00bc09..da083a49 100644
--- a/package.json
+++ b/package.json
@@ -146,16 +146,16 @@
   "optionalDependencies": {
     "@img/sharp-darwin-arm64": "0.34.4",
     "@img/sharp-darwin-x64": "0.34.4",
-    "@img/sharp-libvips-darwin-arm64": "1.2.3",
-    "@img/sharp-libvips-darwin-x64": "1.2.3",
-    "@img/sharp-libvips-linux-arm": "1.2.3",
-    "@img/sharp-libvips-linux-arm64": "1.2.3",
-    "@img/sharp-libvips-linux-ppc64": "1.2.3",
-    "@img/sharp-libvips-linux-riscv64": "1.2.3",
-    "@img/sharp-libvips-linux-s390x": "1.2.3",
-    "@img/sharp-libvips-linux-x64": "1.2.3",
-    "@img/sharp-libvips-linuxmusl-arm64": "1.2.3",
-    "@img/sharp-libvips-linuxmusl-x64": "1.2.3",
+    "@img/sharp-libvips-darwin-arm64": "1.2.4",
+    "@img/sharp-libvips-darwin-x64": "1.2.4",
+    "@img/sharp-libvips-linux-arm": "1.2.4",
+    "@img/sharp-libvips-linux-arm64": "1.2.4",
+    "@img/sharp-libvips-linux-ppc64": "1.2.4",
+    "@img/sharp-libvips-linux-riscv64": "1.2.4",
+    "@img/sharp-libvips-linux-s390x": "1.2.4",
+    "@img/sharp-libvips-linux-x64": "1.2.4",
+    "@img/sharp-libvips-linuxmusl-arm64": "1.2.4",
+    "@img/sharp-libvips-linuxmusl-x64": "1.2.4",
     "@img/sharp-linux-arm": "0.34.4",
     "@img/sharp-linux-arm64": "0.34.4",
     "@img/sharp-linux-ppc64": "0.34.4",
@@ -170,16 +170,16 @@
     "@img/sharp-win32-x64": "0.34.4"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.2.6",
+    "@biomejs/biome": "^2.3.2",
     "@cpplint/cli": "^0.1.0",
-    "@emnapi/runtime": "^1.5.0",
-    "@img/sharp-libvips-dev": "1.2.3",
-    "@img/sharp-libvips-dev-wasm32": "1.2.3",
-    "@img/sharp-libvips-win32-arm64": "1.2.3",
-    "@img/sharp-libvips-win32-ia32": "1.2.3",
-    "@img/sharp-libvips-win32-x64": "1.2.3",
+    "@emnapi/runtime": "^1.6.0",
+    "@img/sharp-libvips-dev": "1.2.4",
+    "@img/sharp-libvips-dev-wasm32": "1.2.4",
+    "@img/sharp-libvips-win32-arm64": "1.2.4",
+    "@img/sharp-libvips-win32-ia32": "1.2.4",
+    "@img/sharp-libvips-win32-x64": "1.2.4",
     "@types/node": "*",
-    "emnapi": "^1.5.0",
+    "emnapi": "^1.6.0",
     "exif-reader": "^2.0.2",
     "extract-zip": "^2.0.1",
     "icc": "^3.0.0",
@@ -194,7 +194,7 @@
     "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
   },
   "config": {
-    "libvips": ">=8.17.2"
+    "libvips": ">=8.17.3"
   },
   "funding": {
     "url": "https://opencollective.com/libvips"
diff --git a/src/common.h b/src/common.h
index 16c07fc7..c15755bb 100644
--- a/src/common.h
+++ b/src/common.h
@@ -19,8 +19,8 @@
 
 #if (VIPS_MAJOR_VERSION < 8) || \
   (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION < 17) || \
-  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION == 17 && VIPS_MICRO_VERSION < 2)
-#error "libvips version 8.17.2+ is required - please see https://sharp.pixelplumbing.com/install"
+  (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION == 17 && VIPS_MICRO_VERSION < 3)
+#error "libvips version 8.17.3+ is required - please see https://sharp.pixelplumbing.com/install"
 #endif
 
 #if defined(__has_include)
diff --git a/src/operations.h b/src/operations.h
index 6582459c..c281c02c 100644
--- a/src/operations.h
+++ b/src/operations.h
@@ -1,5 +1,7 @@
-// Copyright 2013 Lovell Fuller and others.
-// SPDX-License-Identifier: Apache-2.0
+/*!
+  Copyright 2013 Lovell Fuller and others.
+  SPDX-License-Identifier: Apache-2.0
+*/
 
 #ifndef SRC_OPERATIONS_H_
 #define SRC_OPERATIONS_H_
diff --git a/test/unit/failOn.js b/test/unit/failOn.js
index 460b53a1..f5579148 100644
--- a/test/unit/failOn.js
+++ b/test/unit/failOn.js
@@ -109,7 +109,7 @@ describe('failOn', () => {
   it('converts warnings to error for GeoTIFF', async () => {
     await assert.rejects(
       sharp(fixtures.inputTiffGeo).toBuffer(),
-      /Unknown field with tag 33550/
+      /Tag 34737/
     );
   });
 });
diff --git a/test/unit/libvips.js b/test/unit/libvips.js
index ee0c4f1d..6cab3cce 100644
--- a/test/unit/libvips.js
+++ b/test/unit/libvips.js
@@ -180,7 +180,7 @@ describe('libvips binaries', function () {
       process.env.npm_config_arch = 's390x';
       process.env.npm_config_libc = '';
       const locatorHash = libvips.yarnLocator();
-      assert.strictEqual(locatorHash, '7c141893d6');
+      assert.strictEqual(locatorHash, '4ab19140fd');
       delete process.env.npm_config_platform;
       delete process.env.npm_config_arch;
       delete process.env.npm_config_libc;
diff --git a/test/unit/metadata.js b/test/unit/metadata.js
index 5ad41e20..75a6919c 100644
--- a/test/unit/metadata.js
+++ b/test/unit/metadata.js
@@ -1013,13 +1013,23 @@ describe('Image metadata', function () {
       });
   });
 
-  it('Unsupported lossless JPEG passes underlying error message', function (_t, done) {
-    sharp(fixtures.inputJpgLossless)
-      .metadata(function (err) {
-        assert.strictEqual(true, !!err);
-        assert.strictEqual(true, /Input file has corrupt header: VipsJpeg: Unsupported JPEG process: SOF type 0xc3/.test(err.message));
-        done();
-      });
+  it('Lossless JPEG', async () => {
+    const metadata = await sharp(fixtures.inputJpgLossless).metadata();
+    assert.deepStrictEqual(metadata, {
+      format: 'jpeg',
+      width: 227,
+      height: 149,
+      space: 'srgb',
+      channels: 3,
+      depth: 'uchar',
+      density: 72,
+      chromaSubsampling: '4:4:4',
+      isProgressive: false,
+      isPalette: false,
+      hasProfile: false,
+      hasAlpha: false,
+      autoOrient: { width: 227, height: 149 }
+    });
   });
 
   it('keepExif maintains all EXIF metadata', async () => {