diff --git a/.github/workflows/offline-installation.yml b/.github/workflows/offline-installation.yml
index f2d9ebb..c4ba107 100644
--- a/.github/workflows/offline-installation.yml
+++ b/.github/workflows/offline-installation.yml
@@ -182,8 +182,7 @@ jobs:
 
     - name: Get instance-id and modify security group
       run: |
-        INSTANCE_ID=$(aws ec2 describe-instances --query 'Reservations[*].Instances[*].InstanceId' --filters "Name=tag:Name,Values=gha_${{ github.run_id }}_assistant_test" --output text)
-        aws ec2 modify-instance-attribute --instance-id $INSTANCE_ID --groups sg-03c53339089a65829
+        aws ec2 modify-instance-attribute --instance-id $(aws ec2 describe-instances --query 'Reservations[*].Instances[*].InstanceId' --filters "Name=tag:Name,Values=gha_${{ github.run_id }}_assistant_test" --output text) --groups sg-03c53339089a65829
 
     - name: Execute offline installation playbook
       run: |