diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 443c559..aabcb07 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,7 +5,6 @@ on:
     ignore-branches:
       - main
       - future
-
 jobs:
   deployment:
     name: Build the image
@@ -13,26 +12,13 @@ jobs:
     container: docker
     steps:
       - name: Check out repository code
-        uses: actions/checkout@main
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: linux/arm64
+        uses: actions/checkout@master
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v1
 
       - name: Build and push the image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v2
         with:
           push: false
-          platforms: linux/amd64,linux/arm64
-          tags: runner-terraform:latest
-
-      # Can't use the output of the previous step because it's
-      # a multiplatform build, so we need to build it again.
-      - name: Test if terragrunt & infracost works
-        run: |
-          docker build --build-arg TARGETARCH=amd64 -t runner-terraform-test .
-          docker run --rm runner-terraform-test sh -c "terragrunt --version && infracost --version"
+          tags: terraform-runner:latest
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 048b692..6579c02 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@main
+        uses: actions/checkout@master
 
       - name: Install the latest AWS CLI
         run: |
@@ -39,25 +39,19 @@ jobs:
         run: aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws
 
       - name: Log in to GitHub registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v1
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: linux/arm64
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
       - name: Build and push the image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v2
         with:
           push: ${{ github.ref == 'refs/heads/main' || github.ref == 'refs/heads/future' }}
-          platforms: linux/amd64,linux/arm64
           tags: |
             ${{ secrets.PUBLIC_RUNNER_TERRAFORM_ECR_REPOSITORY_URL }}:${{ github.ref == 'refs/heads/main' && 'latest' || 'future' }}
             ghcr.io/spacelift-io/runner-terraform:${{ github.ref == 'refs/heads/main' && 'latest' || 'future' }}
diff --git a/.github/workflows/prod-pr.yml b/.github/workflows/prod-pr.yml
index 220c74d..18f7268 100644
--- a/.github/workflows/prod-pr.yml
+++ b/.github/workflows/prod-pr.yml
@@ -8,7 +8,7 @@ jobs:
   create-pr:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@main
+      - uses: actions/checkout@v2
 
       - name: Create Pull Request
         uses: vsoch/pull-request-action@1.0.22
diff --git a/.github/workflows/trivy.yml b/.github/workflows/trivy.yml
index 69c73b3..9936ba5 100644
--- a/.github/workflows/trivy.yml
+++ b/.github/workflows/trivy.yml
@@ -10,36 +10,27 @@ on:
 
 jobs:
   build:
-    strategy:
-      matrix:
-        arch: [amd64, arm64]
     name: Analyze
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@main
+        uses: actions/checkout@v2
 
-      - name: Set up QEMU
-        if: matrix.arch == 'arm64'
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: linux/arm64
-
-      - name: Build an image from Dockerfile (${{ matrix.arch }} image)
+      - name: Build an image from Dockerfile
         run: |
-          docker build --platform linux/${{ matrix.arch }} --pull --build-arg TARGETARCH=${{ matrix.arch }} -t spacelift:${{ github.sha }}-${{ matrix.arch }} .
+          docker build -t spacelift:${{ github.sha }} .
 
-      - name: Run Trivy vulnerability scanner (${{ matrix.arch }} image)
+      - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
         with:
-          image-ref: "spacelift:${{ github.sha }}-${{ matrix.arch }}"
+          image-ref: "spacelift:${{ github.sha }}"
           format: "template"
           template: "@/contrib/sarif.tpl"
           output: "trivy-results.sarif"
           severity: "CRITICAL,HIGH"
 
-      - name: Upload Trivy scan results to GitHub Security tab (${{ matrix.arch }} image)
-        uses: github/codeql-action/upload-sarif@v2
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v1
         with:
           sarif_file: "trivy-results.sarif"
diff --git a/Dockerfile b/Dockerfile
index e2a68c2..382b4cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,4 @@
-FROM alpine:3.16
-
-ARG TARGETARCH
+FROM alpine:3.14.0
 
 RUN apk -U upgrade && apk add --no-cache \
     aws-cli \
@@ -14,16 +12,15 @@ RUN apk -U upgrade && apk add --no-cache \
     tzdata
 
 # Download infracost
-ADD "https://github.com/infracost/infracost/releases/latest/download/infracost-linux-${TARGETARCH}.tar.gz" /tmp/infracost.tar.gz
-RUN tar -xzf /tmp/infracost.tar.gz -C /bin && \
-    mv "/bin/infracost-linux-${TARGETARCH}" /bin/infracost && \
-    rm /tmp/infracost.tar.gz
+RUN curl -s -L https://github.com/infracost/infracost/releases/latest/download/infracost-linux-amd64.tar.gz | \
+    tar xz -C /tmp && \
+    mv /tmp/infracost-linux-amd64 /bin/infracost
 
 # Download Terragrunt.
-ADD "https://github.com/gruntwork-io/terragrunt/releases/latest/download/terragrunt_linux_${TARGETARCH}" /bin/terragrunt
-RUN chmod +x /bin/terragrunt
+RUN wget -O /bin/terragrunt https://github.com/gruntwork-io/terragrunt/releases/latest/download/terragrunt_linux_amd64 \
+    && chmod +x /bin/terragrunt
 
 RUN echo "hosts: files dns" > /etc/nsswitch.conf \
     && adduser --disabled-password --uid=1983 spacelift
 
-USER spacelift
\ No newline at end of file
+USER spacelift