diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e4e5b14..9586400 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -34,4 +34,4 @@ jobs:
         run: echo "${GITHUB_REF#refs/*/}" > version.txt
 
       - name: Build and Publish Docker
-        run: MPS_VERSION="${{ inputs.mps_version }}" && ./docker-publish.sh
\ No newline at end of file
+        run: MPS_VERSION="${{ inputs.mps_version }}" ./docker-publish.sh
\ No newline at end of file
diff --git a/docker-publish.sh b/docker-publish.sh
index 8c6d2ad..8fb73d9 100755
--- a/docker-publish.sh
+++ b/docker-publish.sh
@@ -2,12 +2,10 @@
 
 set -e
 set -x
+set -u
 
 cd "$(dirname "$0")"
 
-# Default value for MPS_VERSION
-MPS_VERSION="${MPS_VERSION:=2023.2.2}"
-
 MPS_MAJOR_VERSION=`echo $MPS_VERSION | grep -oE '20[0-9]{2}\.[0-9]+'`
 IMAGE_VERSION="$(./version.sh)"