diff --git a/.github/workflows/arbitrator-ci.yml b/.github/workflows/arbitrator-ci.yml
index 0355ebb722..51c0617f3e 100644
--- a/.github/workflows/arbitrator-ci.yml
+++ b/.github/workflows/arbitrator-ci.yml
@@ -82,13 +82,6 @@ jobs:
           targets: 'wasm32-wasi, wasm32-unknown-unknown'
           components: 'llvm-tools-preview, rustfmt, clippy'
 
-      - name: Install rust stable
-        id: install-rust
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: '1.80.1'
-          components: 'llvm-tools-preview, rustfmt, clippy'
-
       - name: Set STYLUS_NIGHTLY_VER environment variable
         run: echo "STYLUS_NIGHTLY_VER=+$(rustup toolchain list | grep '^nightly' | head -n1 | cut -d' ' -f1)" >> "$GITHUB_ENV"
 
diff --git a/arbitrator/Cargo.lock b/arbitrator/Cargo.lock
index 2b437968fa..9688d07229 100644
--- a/arbitrator/Cargo.lock
+++ b/arbitrator/Cargo.lock
@@ -747,11 +747,12 @@ dependencies = [
 
 [[package]]
 name = "dashmap"
-version = "5.5.3"
+version = "6.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "978747c1d849a7d2ee5e8adc0159961c48fb7e5db2f06af6723b80123bb53856"
+checksum = "5041cc499144891f3790297212f32a74fb938e5136a14943f338ef9e0ae276cf"
 dependencies = [
  "cfg-if 1.0.0",
+ "crossbeam-utils",
  "hashbrown 0.14.5",
  "lock_api",
  "once_cell",
@@ -974,8 +975,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if 1.0.0",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1312,15 +1315,6 @@ dependencies = [
  "hashbrown 0.14.5",
 ]
 
-[[package]]
-name = "mach"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b823e83b2affd8f40a9ee8c29dbc56404c1e34cd2710921f2801e2cf29527afa"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "mach2"
 version = "0.4.2"
@@ -2558,7 +2552,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "bytes",
  "cfg-if 1.0.0",
@@ -2580,12 +2574,12 @@ dependencies = [
  "wasmer-types",
  "wasmer-vm",
  "wat",
- "winapi",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "wasmer-compiler"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "backtrace",
  "bytes",
@@ -2594,6 +2588,7 @@ dependencies = [
  "enumset",
  "lazy_static",
  "leb128",
+ "libc",
  "memmap2 0.5.10",
  "more-asserts",
  "region",
@@ -2605,12 +2600,13 @@ dependencies = [
  "wasmer-types",
  "wasmer-vm",
  "wasmparser",
- "winapi",
+ "windows-sys 0.59.0",
+ "xxhash-rust",
 ]
 
 [[package]]
 name = "wasmer-compiler-cranelift"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "cranelift-codegen",
  "cranelift-entity",
@@ -2627,7 +2623,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-llvm"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "byteorder",
  "cc",
@@ -2649,7 +2645,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-compiler-singlepass"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "byteorder",
  "dynasm",
@@ -2666,7 +2662,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer-derive"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "proc-macro-error",
  "proc-macro2",
@@ -2676,21 +2672,25 @@ dependencies = [
 
 [[package]]
 name = "wasmer-types"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "bytecheck",
  "enum-iterator 0.7.0",
  "enumset",
+ "getrandom",
+ "hex",
  "indexmap 1.9.3",
  "more-asserts",
  "rkyv",
+ "sha2 0.10.8",
  "target-lexicon",
  "thiserror",
+ "xxhash-rust",
 ]
 
 [[package]]
 name = "wasmer-vm"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "backtrace",
  "cc",
@@ -2704,14 +2704,14 @@ dependencies = [
  "indexmap 1.9.3",
  "lazy_static",
  "libc",
- "mach",
+ "mach2",
  "memoffset",
  "more-asserts",
  "region",
  "scopeguard",
  "thiserror",
  "wasmer-types",
- "winapi",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2830,6 +2830,15 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.59.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+dependencies = [
+ "windows-targets",
+]
+
 [[package]]
 name = "windows-targets"
 version = "0.52.6"
@@ -2942,6 +2951,12 @@ dependencies = [
  "tap",
 ]
 
+[[package]]
+name = "xxhash-rust"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a5cbf750400958819fb6178eaa83bee5cd9c29a26a40cc241df8c70fdd46984"
+
 [[package]]
 name = "zerocopy"
 version = "0.6.6"
diff --git a/arbitrator/tools/wasmer b/arbitrator/tools/wasmer
index 6b15433d83..84aec79c13 160000
--- a/arbitrator/tools/wasmer
+++ b/arbitrator/tools/wasmer
@@ -1 +1 @@
-Subproject commit 6b15433d83f951555c24f0c56dc05e4751b0cc76
+Subproject commit 84aec79c13888bf3fb324ddbd69b3fecc22d4a8c
diff --git a/arbitrator/wasm-libraries/Cargo.lock b/arbitrator/wasm-libraries/Cargo.lock
index a5a066e5c9..e62acf43a6 100644
--- a/arbitrator/wasm-libraries/Cargo.lock
+++ b/arbitrator/wasm-libraries/Cargo.lock
@@ -518,8 +518,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if 1.0.0",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1633,16 +1635,20 @@ dependencies = [
 
 [[package]]
 name = "wasmer-types"
-version = "4.2.8"
+version = "4.3.7"
 dependencies = [
  "bytecheck",
  "enum-iterator 0.7.0",
  "enumset",
+ "getrandom",
+ "hex",
  "indexmap 1.9.3",
  "more-asserts",
  "rkyv",
+ "sha2 0.10.8",
  "target-lexicon",
  "thiserror",
+ "xxhash-rust",
 ]
 
 [[package]]
@@ -1803,6 +1809,12 @@ dependencies = [
  "tap",
 ]
 
+[[package]]
+name = "xxhash-rust"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a5cbf750400958819fb6178eaa83bee5cd9c29a26a40cc241df8c70fdd46984"
+
 [[package]]
 name = "zerocopy"
 version = "0.7.35"