diff --git a/.github/workflows/flutter-ci.yml b/.github/workflows/flutter-ci.yml
index a2c67551d..5d4cf39c9 100644
--- a/.github/workflows/flutter-ci.yml
+++ b/.github/workflows/flutter-ci.yml
@@ -12,7 +12,7 @@ on:
       - ".github/**"
 
 env:
-  LLVM_VERSION: "10.0"
+  LLVM_VERSION: "15.0.6"
   FLUTTER_VERSION: "3.7.0"
   # vcpkg version: 2022.05.10
   # for multiarch gcc compatibility
@@ -502,14 +502,6 @@ jobs:
           key: ${{ matrix.job.target }}-${{ matrix.job.extra-build-features }}
           cache-directories: "/opt/rust-registry"
 
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          target: ${{ matrix.job.target }}
-          override: true
-          profile: minimal # minimal component installation (ie, no documentation)
-
       - name: Install local registry
         run: |
           mkdir -p /opt/rust-registry
@@ -668,14 +660,6 @@ jobs:
           override: true
           profile: minimal # minimal component installation (ie, no documentation)
 
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          target: ${{ matrix.job.target }}
-          override: true
-          profile: minimal # minimal component installation (ie, no documentation)
-
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: rustdesk-lib-cache
diff --git a/.github/workflows/flutter-nightly.yml b/.github/workflows/flutter-nightly.yml
index 896afd005..83ad7629e 100644
--- a/.github/workflows/flutter-nightly.yml
+++ b/.github/workflows/flutter-nightly.yml
@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 env:
-  LLVM_VERSION: "10.0"
+  LLVM_VERSION: "15.0.6"
   FLUTTER_VERSION: "3.7.0"
   TAG_NAME: "nightly"
   # vcpkg version: 2022.05.10
@@ -648,14 +648,6 @@ jobs:
           key: ${{ matrix.job.target }}-${{ matrix.job.extra-build-features }}
           cache-directories: "/opt/rust-registry"
 
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          target: ${{ matrix.job.target }}
-          override: true
-          profile: minimal # minimal component installation (ie, no documentation)
-
       - name: Install local registry
         run: |
           mkdir -p /opt/rust-registry
@@ -814,14 +806,6 @@ jobs:
           override: true
           profile: minimal # minimal component installation (ie, no documentation)
 
-      - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          target: ${{ matrix.job.target }}
-          override: true
-          profile: minimal # minimal component installation (ie, no documentation)
-
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: rustdesk-lib-cache