diff --git a/.github/codeql.yml b/.github/codeql.yml
new file mode 100644
index 00000000..30ba17f6
--- /dev/null
+++ b/.github/codeql.yml
@@ -0,0 +1,2 @@
+paths:
+- "s3transfer/"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..ff97bc29
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,35 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: ["develop"]
+  pull_request:
+    branches: ["develop"]
+  schedule:
+    - cron: "0 0 * * 5"
+
+permissions: "read-all"
+
+jobs:
+  analyze:
+    name: "Analyze"
+    runs-on: "ubuntu-latest"
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+    - name: "Checkout repository"
+      uses: "actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3"
+
+    - name: "Run CodeQL init"
+      uses: "github/codeql-action/init@cdcdbb579706841c47f7063dda365e292e5cad7a"
+      with:
+        config-file: "./.github/codeql.yml"
+        languages: "python"
+
+    - name: "Run CodeQL autobuild"
+      uses: "github/codeql-action/autobuild@cdcdbb579706841c47f7063dda365e292e5cad7a"
+
+    - name: "Run CodeQL analyze"
+      uses: "github/codeql-action/analyze@cdcdbb579706841c47f7063dda365e292e5cad7a"
diff --git a/.github/workflows/fail-master-prs.yml b/.github/workflows/fail-master-prs.yml
index 671b81ed..e6ca087a 100644
--- a/.github/workflows/fail-master-prs.yml
+++ b/.github/workflows/fail-master-prs.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     branches: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   fail:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 01072688..b72beeb1 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -5,15 +5,18 @@ on:
   pull_request:
     branches-ignore: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
     - name: Set up Python 3.9
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: 3.9
     - name: Run pre-commit
-      uses: pre-commit/action@v2.0.0
+      uses: pre-commit/action@646c83fcd040023954eafda54b4db0192ce70507
diff --git a/.github/workflows/run-crt-test.yml b/.github/workflows/run-crt-test.yml
index e9e2ac22..9c1ded80 100644
--- a/.github/workflows/run-crt-test.yml
+++ b/.github/workflows/run-crt-test.yml
@@ -15,9 +15,9 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies and CRT
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 0f71f2a6..12b39b8c 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -5,6 +5,9 @@ on:
   pull_request:
     branches-ignore: [ master ]
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
@@ -15,9 +18,9 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -27,6 +30,6 @@ jobs:
       run: |
         python scripts/ci/run-tests --with-cov
     - name: codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
       with:
         directory: tests