diff --git a/.github/workflows/beta-release.yml b/.github/workflows/beta-release.yml
index 9a213ec..72806f9 100644
--- a/.github/workflows/beta-release.yml
+++ b/.github/workflows/beta-release.yml
@@ -39,9 +39,11 @@ jobs:
         run: |
           set -euo pipefail
           BASE_VERSION=$(grep -oP '(?<=version = ")[^"]+' Server/pyproject.toml)
-          # Use date + short SHA for unique dev version
-          DEV_SUFFIX="dev$(date +%Y%m%d%H%M).g$(git rev-parse --short HEAD)"
-          DEV_VERSION="${BASE_VERSION}.${DEV_SUFFIX}"
+          # Use date for unique dev version (PEP 440 compliant: X.Y.Z.devN)
+          # Git SHA goes in local version identifier after +
+          DEV_NUMBER="$(date +%Y%m%d%H%M)"
+          GIT_SHA="$(git rev-parse --short HEAD)"
+          DEV_VERSION="${BASE_VERSION}.dev${DEV_NUMBER}+g${GIT_SHA}"
           echo "Base version: $BASE_VERSION"
           echo "Dev version: $DEV_VERSION"
           echo "dev_version=$DEV_VERSION" >> "$GITHUB_OUTPUT"