diff --git a/.github/workflows/as-basic.yml b/.github/workflows/as-basic.yml
index 0e3a6ca60..3df798574 100644
--- a/.github/workflows/as-basic.yml
+++ b/.github/workflows/as-basic.yml
@@ -19,11 +19,8 @@ jobs:
     if: github.event_name == 'pull_request' || github.event_name == 'push'
     name: Check
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        rust:
-          - stable
+    env:
+      RUSTC_VERSION: 1.76.0
     steps:
       - name: Code checkout
         uses: actions/checkout@v4
@@ -56,11 +53,11 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y libsgx-dcap-quote-verify-dev
 
-      - name: Install Rust toolchain (${{ matrix.rust }})
+      - name: Install Rust toolchain (${{ env.RUSTC_VERSION }})
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: ${{ matrix.rust }}
+          toolchain: ${{ env.RUSTC_VERSION }}
           override: true
           components: rustfmt, clippy
 
diff --git a/.github/workflows/as-e2e.yml b/.github/workflows/as-e2e.yml
index 1c71f7a2c..1bfe39f27 100644
--- a/.github/workflows/as-e2e.yml
+++ b/.github/workflows/as-e2e.yml
@@ -28,6 +28,7 @@ jobs:
     name: TEE=${{ matrix.restful_tee_enum }} Generate Evidence Dynamically=${{ matrix.generate_evidence }}
     runs-on: ${{ matrix.runner }}
     env:
+      RUSTC_VERSION: 1.76.0
       GRPC_TEE_ENUM: ${{ matrix.grpc_tee_enum }}
       RESTFUL_TEE_ENUM: ${{ matrix.restful_tee_enum }}
     steps:
@@ -36,7 +37,7 @@ jobs:
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: stable
+        toolchain: ${{ env.RUSTC_VERSION }}
 
     - uses: actions/setup-go@v5
       with:
diff --git a/.github/workflows/kbs-docker-e2e.yaml b/.github/workflows/kbs-docker-e2e.yaml
index 2faff86ad..6dc5aa98e 100644
--- a/.github/workflows/kbs-docker-e2e.yaml
+++ b/.github/workflows/kbs-docker-e2e.yaml
@@ -12,6 +12,8 @@ env:
 jobs:
   e2e-test:
     runs-on: ubuntu-latest
+    env:
+      RUSTC_VERSION: 1.76.0
     steps:
     - name: Checkout KBS
       uses: actions/checkout@v4
@@ -20,7 +22,7 @@ jobs:
       uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: stable
+        toolchain: ${{ env.RUSTC_VERSION }}
 
     - name: Build client
       uses: actions-rs/cargo@v1
diff --git a/.github/workflows/kbs-e2e.yaml b/.github/workflows/kbs-e2e.yaml
index 04ebd4ed1..5ae59633a 100644
--- a/.github/workflows/kbs-e2e.yaml
+++ b/.github/workflows/kbs-e2e.yaml
@@ -23,7 +23,8 @@ defaults:
 jobs:
   e2e-test:
     runs-on: ${{ fromJSON(inputs.runs-on) }}
-
+    env:
+      RUSTC_VERSION: 1.76.0
     steps:
     - uses: actions/download-artifact@v4
 
@@ -33,7 +34,7 @@ jobs:
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: stable
+        toolchain: ${{ env.RUSTC_VERSION }}
 
     - uses: actions/setup-go@v5
       with:
diff --git a/.github/workflows/kbs-rust.yml b/.github/workflows/kbs-rust.yml
index 314e0c54c..7b1cd6010 100644
--- a/.github/workflows/kbs-rust.yml
+++ b/.github/workflows/kbs-rust.yml
@@ -21,15 +21,9 @@ jobs:
   ci:
     strategy:
       fail-fast: false
-      matrix:
-        rust:
-          - stable
-          - beta
-          - nightly
-        os:
-          - ubuntu-latest
-
-    runs-on: ${{ matrix.os }}
+    env:
+      RUSTC_VERSION: 1.76.0
+    runs-on: ubuntu-latest
 
     steps:
     - name: Code checkout
@@ -39,7 +33,7 @@ jobs:
       uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: ${{ matrix.rust }}
+        toolchain: ${{ env.RUSTC_VERSION }}
         override: true
         components: rustfmt, clippy
         target: x86_64-unknown-linux-gnu