diff --git a/.github/workflows/build-backend-app-generic.yml b/.github/workflows/build-backend-app-generic.yml
index 2fc7cc2..8aa0021 100644
--- a/.github/workflows/build-backend-app-generic.yml
+++ b/.github/workflows/build-backend-app-generic.yml
@@ -2,7 +2,7 @@ on:
   workflow_call:
     inputs:
       dockerImage:
-        required: true
+        required: false
         type: string
       dockerUsername:
         required: true
@@ -55,7 +55,7 @@ jobs:
         run: >
           mvn --batch-mode deploy -DskipTests -Dmaven.install.skip -Dmaven.deploy.skip -Dpowsybl.docker.deploy
           -Djib.httpTimeout=60000
-          -Djib.to.image="$RUNGHA_DOCKER_IMAGE"
+          ${RUNGHA_DOCKER_IMAGE:+-Djib.to.image="$RUNGHA_DOCKER_IMAGE"}
           -Djib.to.auth.username="$RUNGHA_DOCKER_USERNAME"
           -Djib.to.auth.password="$RUNGHA_DOCKERHUB_TOKEN"
         env:
diff --git a/.github/workflows/manual-dockerdeploy-backend-app-generic.yml b/.github/workflows/manual-dockerdeploy-backend-app-generic.yml
index 07dc2b8..c7f35ff 100644
--- a/.github/workflows/manual-dockerdeploy-backend-app-generic.yml
+++ b/.github/workflows/manual-dockerdeploy-backend-app-generic.yml
@@ -2,7 +2,7 @@ on:
   workflow_call:
     inputs:
       dockerImage:
-        required: true
+        required: false
         type: string
       dockerUsername:
         required: true
@@ -78,7 +78,7 @@ jobs:
         run: >
           mvn --batch-mode deploy -DskipTests -Dmaven.install.skip -Dmaven.deploy.skip -Dpowsybl.docker.deploy
           -Djib.httpTimeout=60000
-          -Djib.to.image="$RUNGHA_DOCKER_IMAGE:$CURRENT_TAG_VERSION"
+          ${RUNGHA_DOCKER_IMAGE:+-Djib.to.image="$RUNGHA_DOCKER_IMAGE:$CURRENT_TAG_VERSION"}
           -Djib.to.auth.username="$RUNGHA_DOCKER_USERNAME"
           -Djib.to.auth.password="$RUNGHA_DOCKER_RELEASE"
         env:
diff --git a/.github/workflows/patch-backend-app-generic.yml b/.github/workflows/patch-backend-app-generic.yml
index 2b9368c..0c30e68 100644
--- a/.github/workflows/patch-backend-app-generic.yml
+++ b/.github/workflows/patch-backend-app-generic.yml
@@ -5,7 +5,7 @@ on:
         required: true
         type: string
       dockerImage:
-        required: true
+        required: false
         type: string
       dockerUsername:
         required: true
@@ -182,7 +182,7 @@ jobs:
         run: >
           mvn --batch-mode deploy -DskipTests -Dmaven.install.skip -Dmaven.deploy.skip -Dpowsybl.docker.deploy
           -Djib.httpTimeout=60000
-          -Djib.to.image="$RUNGHA_DOCKER_IMAGE:$GITHUB_SHORT_VERSION"
+          ${RUNGHA_DOCKER_IMAGE:+-Djib.to.image="$RUNGHA_DOCKER_IMAGE:$GITHUB_SHORT_VERSION"}
           -Djib.to.auth.username="$RUNGHA_DOCKER_USERNAME"
           -Djib.to.auth.password="$RUNGHA_DOCKERHUB_TOKEN"
         env:
diff --git a/.github/workflows/release-backend-app-generic.yml b/.github/workflows/release-backend-app-generic.yml
index 1e01c5b..2aec4a4 100644
--- a/.github/workflows/release-backend-app-generic.yml
+++ b/.github/workflows/release-backend-app-generic.yml
@@ -5,7 +5,7 @@ on:
         required: true
         type: string
       dockerImage:
-        required: true
+        required: false
         type: string
       dockerUsername:
         required: true
@@ -234,7 +234,7 @@ jobs:
         run: >
           mvn --batch-mode deploy -DskipTests -Dmaven.install.skip -Dmaven.deploy.skip -Dpowsybl.docker.deploy
           -Djib.httpTimeout=60000
-          -Djib.to.image="$RUNGHA_DOCKER_IMAGE:$GITHUB_SHORT_VERSION"
+          ${RUNGHA_DOCKER_IMAGE:+-Djib.to.image="$RUNGHA_DOCKER_IMAGE:$GITHUB_SHORT_VERSION"}
           -Djib.to.auth.username="$RUNGHA_DOCKER_USERNAME"
           -Djib.to.auth.password="$RUNGHA_DOCKERHUB_TOKEN"
         env: