diff --git a/.github/workflows/release-v4.yaml b/.github/workflows/release-v4.yaml
deleted file mode 100644
index f49a1686d..000000000
--- a/.github/workflows/release-v4.yaml
+++ /dev/null
@@ -1,91 +0,0 @@
-# SPDX-FileCopyrightText: 2025 Contributors to the OpenSTEF project <short.term.energy.forecasts@alliander.com>
-# SPDX-License-Identifier: MPL-2.0
-
-name: Release V4
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-on:
-  release:
-    types: [published]
-  workflow_dispatch:
-    inputs:
-      version:
-        description: 'Version tag to release (e.g., v4.1.0 or 4.1.0). Prefixing with v is optional.'
-        required: true
-        default: ''
-      publish:
-        description: 'Whether to publish packages after the build (true/false).'
-        required: false
-        default: false
-        type: boolean
-
-permissions:
-  contents: read
-
-jobs:
-  quality:
-    if: ${{ startsWith(github.ref, 'refs/tags/v4.') || (github.event_name == 'workflow_dispatch' && startsWith(github.event.inputs.version, 'v4')) }}
-    name: Quality Checks
-    uses: ./.github/workflows/_job_quality_check.yaml
-
-  release-pypi-package:
-    name: Release PyPI Package
-    needs: quality
-    runs-on: ubuntu-latest
-    if: ${{ (startsWith(github.ref, 'refs/tags/v4.') || (github.event_name == 'workflow_dispatch' && startsWith(github.event.inputs.version, 'v4'))) && needs.quality.result == 'success' }}
-    permissions:
-      # IMPORTANT: this permission is mandatory for trusted publishing
-      id-token: write
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          show-progress: false
-      - name: Install uv
-        uses: astral-sh/setup-uv@v6
-        with:
-          activate-environment: true
-          enable-cache: true
-      - name: Install build dependencies
-        run: uv sync --frozen --no-install-project --all-groups --all-extras
-
-      # Start of release steps
-      - name: Set version from release
-        id: ver
-        env:
-          RELEASE_TAG: ${{ github.event.release.tag_name }}
-          INPUT_VERSION: ${{ github.event.inputs.version }}
-        run: |
-          # Prefer release payload tag_name, otherwise fallback to the workflow_dispatch input
-          if [ -n "$RELEASE_TAG" ]; then
-            VERSION="$RELEASE_TAG"
-          elif [ -n "$INPUT_VERSION" ]; then
-            VERSION="$INPUT_VERSION"
-          else
-            # As a last-resort fallback, try to get the ref tag from GITHUB_REF
-            if [[ "$GITHUB_REF" == refs/tags/* ]]; then
-              VERSION="${GITHUB_REF#refs/tags/}"
-            else
-              echo "No version provided via release or workflow input, aborting"
-              exit 1
-            fi
-          fi
-          # Remove leading 'v' if present
-          VERSION="${VERSION#v}"
-          echo "Release version: $VERSION"
-          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
-      - name: Apply version
-        run: poe version --version "${{ steps.ver.outputs.version }}"
-      - name: Build all packages
-        run: poe build
-      - name: Publish packages
-        if: ${{ github.event_name == 'release' || (github.event_name == 'workflow_dispatch' && github.event.inputs.publish == true) }}
-        env:
-          UV_PUBLISH_USERNAME: ${{ secrets.PYPI_USERNAME }}
-          UV_PUBLISH_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
-        run: uv publish
-      - name: Summary
-        run: echo "Published version ${{ steps.ver.outputs.version }}"
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