diff --git a/.github/workflows/preview-build.yml b/.github/workflows/preview-build.yml
index c468c70a17..16bb7253a7 100644
--- a/.github/workflows/preview-build.yml
+++ b/.github/workflows/preview-build.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: cache package-lock.json
         uses: actions/cache@v2
@@ -47,7 +47,7 @@ jobs:
     needs: setup
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
diff --git a/.github/workflows/rebase.yml b/.github/workflows/rebase.yml
index 8e858fefb9..0d4b713e9b 100644
--- a/.github/workflows/rebase.yml
+++ b/.github/workflows/rebase.yml
@@ -1,6 +1,6 @@
 name: Automatic Rebase
 
-on: 
+on:
   issue_comment:
     types: [created]
 
@@ -10,7 +10,7 @@ jobs:
     if: github.event.issue.pull_request != '' && (contains(github.event.comment.body, '/rebase') || contains(github.event.comment.body, '\rebase'))
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
       with:
         fetch-depth: 0
     - name: Automatic Rebase
diff --git a/.github/workflows/site-deploy.yml b/.github/workflows/site-deploy.yml
index 89d9e6f4cb..77008b5bf5 100644
--- a/.github/workflows/site-deploy.yml
+++ b/.github/workflows/site-deploy.yml
@@ -10,7 +10,7 @@ jobs:
     if: github.event.ref_type == 'tag' && (contains(github.event.ref, '-') == false)
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: cache package-lock.json
         uses: actions/cache@v2
@@ -43,7 +43,7 @@ jobs:
     needs: setup
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d7b2086d6b..3b2abedf11 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: cache package-lock.json
         uses: actions/cache@v2
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -100,7 +100,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -122,7 +122,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -145,7 +145,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -171,7 +171,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -194,7 +194,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -225,7 +225,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -256,7 +256,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -296,7 +296,7 @@ jobs:
       REACT: 16
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -324,7 +324,7 @@ jobs:
       REACT: 16
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -352,7 +352,7 @@ jobs:
       REACT: 16
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -388,7 +388,7 @@ jobs:
       REACT: 16
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -424,7 +424,7 @@ jobs:
       REACT: 16
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
@@ -460,7 +460,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: restore cache from package-lock.json
         uses: actions/cache@v2
diff --git a/.github/workflows/ui.yml b/.github/workflows/ui.yml
index 4a29ce4bd6..daace2e28e 100644
--- a/.github/workflows/ui.yml
+++ b/.github/workflows/ui.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v2
 
       - name: cache package-lock.json
         uses: actions/cache@v2