diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c86a0641..a94483a3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -208,7 +208,7 @@ jobs:
       contents: write
     name: wasm32 - prebuild
     runs-on: ubuntu-24.04
-    container: "emscripten/emsdk:4.0.5"
+    container: "emscripten/emsdk:4.0.6"
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/npm/darwin-arm64/package.json b/npm/darwin-arm64/package.json
index 08d01dd7..93ac3ebd 100644
--- a/npm/darwin-arm64/package.json
+++ b/npm/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-darwin-arm64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with macOS 64-bit ARM",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-darwin-arm64": "1.1.0-rc4"
+    "@img/sharp-libvips-darwin-arm64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/darwin-x64/package.json b/npm/darwin-x64/package.json
index 39c3ca34..e96a9cf8 100644
--- a/npm/darwin-x64/package.json
+++ b/npm/darwin-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-darwin-x64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with macOS x64",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-darwin-x64": "1.1.0-rc4"
+    "@img/sharp-libvips-darwin-x64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linux-arm/package.json b/npm/linux-arm/package.json
index e5ac83b6..49275f99 100644
--- a/npm/linux-arm/package.json
+++ b/npm/linux-arm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linux-arm",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (glibc) ARM (32-bit)",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-arm": "1.1.0-rc4.1"
+    "@img/sharp-libvips-linux-arm": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linux-arm64/package.json b/npm/linux-arm64/package.json
index b80a8182..2489b167 100644
--- a/npm/linux-arm64/package.json
+++ b/npm/linux-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linux-arm64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (glibc) 64-bit ARM",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-arm64": "1.1.0-rc4"
+    "@img/sharp-libvips-linux-arm64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linux-ppc64/package.json b/npm/linux-ppc64/package.json
index 4ec89b14..d6fa002b 100644
--- a/npm/linux-ppc64/package.json
+++ b/npm/linux-ppc64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linux-ppc64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (glibc) ppc64",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-ppc64": "1.1.0-rc4"
+    "@img/sharp-libvips-linux-ppc64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linux-s390x/package.json b/npm/linux-s390x/package.json
index 8388328b..7ad1f34a 100644
--- a/npm/linux-s390x/package.json
+++ b/npm/linux-s390x/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linux-s390x",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (glibc) s390x",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-s390x": "1.1.0-rc4"
+    "@img/sharp-libvips-linux-s390x": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linux-x64/package.json b/npm/linux-x64/package.json
index 9826c11f..e7b69b07 100644
--- a/npm/linux-x64/package.json
+++ b/npm/linux-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linux-x64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (glibc) x64",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-x64": "1.1.0-rc4"
+    "@img/sharp-libvips-linux-x64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linuxmusl-arm64/package.json b/npm/linuxmusl-arm64/package.json
index 0b35f1b1..c5a1058f 100644
--- a/npm/linuxmusl-arm64/package.json
+++ b/npm/linuxmusl-arm64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linuxmusl-arm64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (musl) 64-bit ARM",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linuxmusl-arm64": "1.1.0-rc4"
+    "@img/sharp-libvips-linuxmusl-arm64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/linuxmusl-x64/package.json b/npm/linuxmusl-x64/package.json
index f6fec2b8..af57ffd0 100644
--- a/npm/linuxmusl-x64/package.json
+++ b/npm/linuxmusl-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-linuxmusl-x64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Linux (musl) x64",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linuxmusl-x64": "1.1.0-rc4"
+    "@img/sharp-libvips-linuxmusl-x64": "1.1.0-rc5"
   },
   "files": [
     "lib"
diff --git a/npm/package.json b/npm/package.json
index 6b6d52be..9b18c177 100644
--- a/npm/package.json
+++ b/npm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "private": "true",
   "workspaces": [
     "darwin-arm64",
diff --git a/npm/wasm32/package.json b/npm/wasm32/package.json
index 8e152bb7..9d5979fc 100644
--- a/npm/wasm32/package.json
+++ b/npm/wasm32/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-wasm32",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with wasm32",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
@@ -31,7 +31,7 @@
     "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
   },
   "dependencies": {
-    "@emnapi/runtime": "^1.3.1"
+    "@emnapi/runtime": "^1.4.0"
   },
   "cpu": [
     "wasm32"
diff --git a/npm/win32-ia32/package.json b/npm/win32-ia32/package.json
index 7e8dfbac..d94e49eb 100644
--- a/npm/win32-ia32/package.json
+++ b/npm/win32-ia32/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-win32-ia32",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Windows x86 (32-bit)",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
diff --git a/npm/win32-x64/package.json b/npm/win32-x64/package.json
index 9aa0d50c..748953ab 100644
--- a/npm/win32-x64/package.json
+++ b/npm/win32-x64/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@img/sharp-win32-x64",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "description": "Prebuilt sharp for use with Windows x64",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
diff --git a/package.json b/package.json
index 7a570604..e391fcaf 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "sharp",
   "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, GIF, AVIF and TIFF images",
-  "version": "0.34.0-rc.0",
+  "version": "0.34.0-rc.1",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://sharp.pixelplumbing.com",
   "contributors": [
@@ -142,36 +142,36 @@
     "semver": "^7.7.1"
   },
   "optionalDependencies": {
-    "@img/sharp-darwin-arm64": "0.34.0-rc.0",
-    "@img/sharp-darwin-x64": "0.34.0-rc.0",
-    "@img/sharp-libvips-darwin-arm64": "1.1.0-rc4",
-    "@img/sharp-libvips-darwin-x64": "1.1.0-rc4",
-    "@img/sharp-libvips-linux-arm": "1.1.0-rc4.1",
-    "@img/sharp-libvips-linux-arm64": "1.1.0-rc4",
-    "@img/sharp-libvips-linux-ppc64": "1.1.0-rc4",
-    "@img/sharp-libvips-linux-s390x": "1.1.0-rc4",
-    "@img/sharp-libvips-linux-x64": "1.1.0-rc4",
-    "@img/sharp-libvips-linuxmusl-arm64": "1.1.0-rc4",
-    "@img/sharp-libvips-linuxmusl-x64": "1.1.0-rc4",
-    "@img/sharp-linux-arm": "0.34.0-rc.0",
-    "@img/sharp-linux-arm64": "0.34.0-rc.0",
-    "@img/sharp-linux-s390x": "0.34.0-rc.0",
-    "@img/sharp-linux-x64": "0.34.0-rc.0",
-    "@img/sharp-linuxmusl-arm64": "0.34.0-rc.0",
-    "@img/sharp-linuxmusl-x64": "0.34.0-rc.0",
-    "@img/sharp-wasm32": "0.34.0-rc.0",
-    "@img/sharp-win32-ia32": "0.34.0-rc.0",
-    "@img/sharp-win32-x64": "0.34.0-rc.0"
+    "@img/sharp-darwin-arm64": "0.34.0-rc.1",
+    "@img/sharp-darwin-x64": "0.34.0-rc.1",
+    "@img/sharp-libvips-darwin-arm64": "1.1.0-rc5",
+    "@img/sharp-libvips-darwin-x64": "1.1.0-rc5",
+    "@img/sharp-libvips-linux-arm": "1.1.0-rc5",
+    "@img/sharp-libvips-linux-arm64": "1.1.0-rc5",
+    "@img/sharp-libvips-linux-ppc64": "1.1.0-rc5",
+    "@img/sharp-libvips-linux-s390x": "1.1.0-rc5",
+    "@img/sharp-libvips-linux-x64": "1.1.0-rc5",
+    "@img/sharp-libvips-linuxmusl-arm64": "1.1.0-rc5",
+    "@img/sharp-libvips-linuxmusl-x64": "1.1.0-rc5",
+    "@img/sharp-linux-arm": "0.34.0-rc.1",
+    "@img/sharp-linux-arm64": "0.34.0-rc.1",
+    "@img/sharp-linux-s390x": "0.34.0-rc.1",
+    "@img/sharp-linux-x64": "0.34.0-rc.1",
+    "@img/sharp-linuxmusl-arm64": "0.34.0-rc.1",
+    "@img/sharp-linuxmusl-x64": "0.34.0-rc.1",
+    "@img/sharp-wasm32": "0.34.0-rc.1",
+    "@img/sharp-win32-ia32": "0.34.0-rc.1",
+    "@img/sharp-win32-x64": "0.34.0-rc.1"
   },
   "devDependencies": {
-    "@emnapi/runtime": "^1.3.1",
-    "@img/sharp-libvips-dev": "1.1.0-rc4",
-    "@img/sharp-libvips-dev-wasm32": "1.1.0-rc4",
-    "@img/sharp-libvips-win32-ia32": "1.1.0-rc4",
-    "@img/sharp-libvips-win32-x64": "1.1.0-rc4",
+    "@emnapi/runtime": "^1.4.0",
+    "@img/sharp-libvips-dev": "1.1.0-rc5",
+    "@img/sharp-libvips-dev-wasm32": "1.1.0-rc5",
+    "@img/sharp-libvips-win32-ia32": "1.1.0-rc5",
+    "@img/sharp-libvips-win32-x64": "1.1.0-rc5",
     "@types/node": "*",
     "cc": "^3.0.1",
-    "emnapi": "^1.3.1",
+    "emnapi": "^1.4.0",
     "exif-reader": "^2.0.2",
     "extract-zip": "^2.0.1",
     "icc": "^3.0.0",
diff --git a/test/unit/libvips.js b/test/unit/libvips.js
index 18d33f19..046a0da1 100644
--- a/test/unit/libvips.js
+++ b/test/unit/libvips.js
@@ -179,7 +179,7 @@ describe('libvips binaries', function () {
       process.env.npm_config_arch = 's390x';
       process.env.npm_config_libc = '';
       const locatorHash = libvips.yarnLocator();
-      assert.strictEqual(locatorHash, 'e34c58507a');
+      assert.strictEqual(locatorHash, '0922dba817');
       delete process.env.npm_config_platform;
       delete process.env.npm_config_arch;
       delete process.env.npm_config_libc;