diff --git a/.github/workflows/content-artifacts.yml b/.github/workflows/content-artifacts.yml
index 0b71a7a30..e423225ab 100644
--- a/.github/workflows/content-artifacts.yml
+++ b/.github/workflows/content-artifacts.yml
@@ -20,7 +20,7 @@ jobs:
     name: Content Validation Checking, Conversion and Validation
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
         with:
           path: git-content
           submodules: recursive
diff --git a/.github/workflows/create-release.yml b/.github/workflows/create-release.yml
index 1a4f56930..e0d173128 100644
--- a/.github/workflows/create-release.yml
+++ b/.github/workflows/create-release.yml
@@ -9,7 +9,7 @@ jobs:
 
     steps:
       # Check-out the repository under $GITHUB_WORKSPACE
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Read Node version from .nvmrc
         run: echo "##[set-output name=NVMRC;]$(cat .nvmrc)"
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 4dcfca14c..25b8db90e 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -24,7 +24,7 @@ jobs:
     steps:
       # Check-out the repository under $GITHUB_WORKSPACE
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Read node version from `.nvmrc` file
         id: nvmrc
diff --git a/.github/workflows/runSchematronValidation.yml b/.github/workflows/runSchematronValidation.yml
index 1fcfb1c4c..9ccc86987 100644
--- a/.github/workflows/runSchematronValidation.yml
+++ b/.github/workflows/runSchematronValidation.yml
@@ -24,7 +24,7 @@ jobs:
     # Checkout repository and its submodules
     steps:
       # Check-out the repository under $GITHUB_WORKSPACE
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       # Check-out submodules
       - name: Checkout submodules
diff --git a/src/content/docker-compose.yml b/src/content/docker-compose.yml
index a16e64caa..fd0c9cbd0 100644
--- a/src/content/docker-compose.yml
+++ b/src/content/docker-compose.yml
@@ -1,6 +1,5 @@
 # This extends the OSCAL build container which should be located at:
 # ../../vendor/oscal/build/docker-compose.yml
-version: '3'
 services:
   cli:
     volumes:
diff --git a/src/content/module.mk b/src/content/module.mk
index b3268ca37..78a6a72b1 100644
--- a/src/content/module.mk
+++ b/src/content/module.mk
@@ -9,7 +9,7 @@ OSCAL_DIR := vendor/oscal
 CICD_DIR_PATH := $(OSCAL_DIR)/build/ci-cd
 CONTENT_CONFIG_PATH := src/config
 
-OSCAL_DOCKER := docker-compose -f $(OSCAL_DIR)/build/docker-compose.yml -f $(CONTENT_DIR)/docker-compose.yml
+OSCAL_DOCKER := docker compose -f $(OSCAL_DIR)/build/docker-compose.yml -f $(CONTENT_DIR)/docker-compose.yml
 
 init-content:  ## Initialize content build environment (build Docker image)
 	@echo "Building Docker image for OSCAL content generation..."
diff --git a/src/examples/java/README.md b/src/examples/java/README.md
index 2a96eecc5..433322814 100644
--- a/src/examples/java/README.md
+++ b/src/examples/java/README.md
@@ -15,14 +15,14 @@ make build-validations
 
 ## Usage
 
-This example uses Maven. You may run directly, or via the provided `docker-compose` configuration.
+This example uses Maven. You may run directly, or via the provided `docker compose` configuration.
 
 ```bash
 mvn --help
 ```
 
 ```bash
-docker-compose run example mvn --help
+docker compose run example mvn --help
 ```
 
 ## Developer notes
@@ -30,11 +30,11 @@ docker-compose run example mvn --help
 To run tests:
 
 ```bash
-docker-compose run example mvn test
+docker compose run example mvn test
 ```
 
 To auto-format code:
 
 ```bash
-docker-compose run example mvn com.coveo:fmt-maven-plugin:format
+docker compose run example mvn com.coveo:fmt-maven-plugin:format
 ```
diff --git a/src/examples/javascript/README.md b/src/examples/javascript/README.md
index b9ae96f03..9feb90cee 100644
--- a/src/examples/javascript/README.md
+++ b/src/examples/javascript/README.md
@@ -23,7 +23,7 @@ make build-validations
 To get a bash prompt within the container, run:
 
 ```bash
-docker-compose run example bash -l
+docker compose run example bash -l
 ```
 
 You may now run and interact with the example code.
@@ -33,11 +33,11 @@ You may now run and interact with the example code.
 To run tests, build the required Schematron XSLT to sef.json files and run the test script:
 
 ```bash
-docker-compose run example npm run ./test.sh
+docker compose run example npm run ./test.sh
 ```
 
 To auto-format code:
 
 ```bash
-docker-compose run example npm format
+docker compose run example npm format
 ```
diff --git a/src/examples/module.mk b/src/examples/module.mk
index 8881d0e3b..749cb471f 100644
--- a/src/examples/module.mk
+++ b/src/examples/module.mk
@@ -3,14 +3,14 @@ test-examples: test-example-java test-example-python test-example-javascript  ##
 test-example-java:  ## Test example Java project
 	@echo "Verifying Java example..."
 	cd src/examples/java && \
-		docker-compose run example mvn test
+		docker compose run example mvn test
 
 test-example-python:  ## Test example Python project
 	@echo "Verifying Python example..."
 	cd src/examples/python && \
-		docker-compose run example pytest
+		docker compose run example pytest
 
 test-example-javascript:  ## Test example Javascript project
 	@echo "Verifying Javascript example..."
 	cd src/examples/javascript && \
-		docker-compose run example ./test.sh
+		docker compose run example ./test.sh
diff --git a/src/examples/python/README.md b/src/examples/python/README.md
index 1ac9716f9..fa322fd5e 100644
--- a/src/examples/python/README.md
+++ b/src/examples/python/README.md
@@ -19,7 +19,7 @@ make build-validations
 To get a bash prompt within the container, run:
 
 ```bash
-docker-compose run example bash -l
+docker compose run example bash -l
 ```
 
 You may now run and interact with the example code.
@@ -29,17 +29,17 @@ You may now run and interact with the example code.
 To run tests:
 
 ```bash
-docker-compose run example pytest
+docker compose run example pytest
 ```
 
 To auto-format code:
 
 ```bash
-docker-compose run example black
+docker compose run example black
 ```
 
 To type-check code:
 
 ```bash
-docker-compose run example mypy .
+docker compose run example mypy .
 ```
diff --git a/src/validations/CONTRIBUTING.md b/src/validations/CONTRIBUTING.md
index 6c1c35863..5facb0528 100644
--- a/src/validations/CONTRIBUTING.md
+++ b/src/validations/CONTRIBUTING.md
@@ -59,10 +59,10 @@ Using the command with a different version of Saxon HE. *Note that you must down
 ./bin/validate_with_schematron.sh -f test/demo/FedRAMP-SSP-OSCAL-Template.xml -o ~/dev/report -v 10.8
 ```
 
-Alternatively, you can also use `docker-compose` to execute the validation script, like so:
+Alternatively, you can also use `docker compose` to execute the validation script, like so:
 
 ```sh
-docker-compose run \
+docker compose run \
   -w /root/src/validations \
   validator \
   ./bin/validate_with_schematron.sh -f ./test/demo/FedRAMP-SSP-OSCAL-Template.xml
@@ -100,10 +100,10 @@ export TEST_DIR=$(pwd)/report/test
 
 The JUnit XML report will be stored in the path set in the `TEST_DIR` environment variable.
 
-Alternatively, you can also use `docker-compose` to execute the test harness, like so:
+Alternatively, you can also use `docker compose` to execute the test harness, like so:
 
 ```sh
-docker-compose run \
+docker compose run \
   -w /root/src/validations \
   validator \
   /root/vendor/xspec/bin/xspec.sh -s -j ./test/test_all.xspec