diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a24c5fea..a871f098 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,7 @@ jobs:
             target: x86_64-unknown-linux-gnu
             cross: true
             extra-args: "--all-features"
+            rustflags: "-Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: ubuntu-latest
             target: i686-unknown-linux-gnu
             cross: true
@@ -51,7 +52,7 @@ jobs:
             release-name: x86_64-unknown-linux-gnu-static-crt
             cross: true
             extra-args: "--all-features"
-            rustflags: "-Ctarget-feature=+crt-static --cfg tokio_unstable"
+            rustflags: "-Ctarget-feature=+crt-static -Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: ubuntu-latest
             target: i686-unknown-linux-gnu
             release-name: i686-unknown-linux-gnu-static-crt
@@ -95,6 +96,7 @@ jobs:
             cross: false
             postfix: ".exe"
             extra-args: "--all-features"
+            rustflags: "-Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: windows-latest
             target: i686-pc-windows-msvc
             cross: false
@@ -107,7 +109,7 @@ jobs:
             cross: false
             postfix: ".exe"
             extra-args: "--all-features"
-            rustflags: "-Ctarget-feature=+crt-static --cfg tokio_unstable"
+            rustflags: "-Ctarget-feature=+crt-static -Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: windows-latest
             target: i686-pc-windows-msvc
             release-name: i686-pc-windows-msvc-static-crt
@@ -120,6 +122,7 @@ jobs:
             target: x86_64-apple-darwin
             cross: false
             extra-args: "--all-features"
+            rustflags: "-Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: macos-14
             target: aarch64-apple-darwin
             cross: false
@@ -130,7 +133,7 @@ jobs:
             release-name: x86_64-apple-darwin-static-crt
             cross: false
             extra-args: "--all-features"
-            rustflags: "-Ctarget-feature=+crt-static --cfg tokio_unstable"
+            rustflags: "-Ctarget-feature=+crt-static -Ctarget-cpu=sandybridge --cfg tokio_unstable"
           - os: macos-14
             target: aarch64-apple-darwin
             release-name: aarch64-apple-darwin-static-crt