diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 5a18446f5..e8c2d42cb 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
 
     - name: Set project and image names
       run: |
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Set project and image names
         run: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 366f4bdbc..74224155a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
       RUST_BACKTRACE: full
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.rust }}
@@ -80,7 +80,7 @@ jobs:
 
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.rust }}
@@ -109,7 +109,7 @@ jobs:
       RUST_BACKTRACE: full
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
@@ -139,7 +139,7 @@ jobs:
       RUST_BACKTRACE: full
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
@@ -166,7 +166,7 @@ jobs:
       RUST_BACKTRACE: full
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 591371b25..e554a24dd 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 45
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - uses: actions-rs/toolchain@v1
         with:
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 5dc61176a..405c4bbd8 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout the source code
-      uses: actions/checkout@master
+      uses: actions/checkout@v2.3.4
 
     - name: Install latest beta
       uses: actions-rs/toolchain@v1
diff --git a/.github/workflows/manual-deploy.yml b/.github/workflows/manual-deploy.yml
index 1ba15fee7..a3931d427 100644
--- a/.github/workflows/manual-deploy.yml
+++ b/.github/workflows/manual-deploy.yml
@@ -17,7 +17,7 @@ jobs:
     name: Deploy one zebrad node
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
 
     - name: Set project and image names
       run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 665bc40c1..638ed63d2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ jobs:
     name: Run all tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Set project and image names
         run: |
diff --git a/.github/workflows/zcashd-manual-deploy.yml b/.github/workflows/zcashd-manual-deploy.yml
index 577bd092c..32623648e 100644
--- a/.github/workflows/zcashd-manual-deploy.yml
+++ b/.github/workflows/zcashd-manual-deploy.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Set project and image names
         run: |