diff --git a/Jenkinsfile b/Jenkinsfile
index d02cc0a..27d5151 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -12,7 +12,9 @@ pipeline {
                 dir('server') {
                     sh 'echo "eula=true" > eula.txt'
                     sh "chmod u+x ./run.sh"
-                    sh 'echo "stop" | ./run.sh'
+                    lock('Port 25565') {
+                        sh 'echo "stop" | ./run.sh'
+                    }
                 }
                 logParser failBuildOnError: true, projectRulePath: 'Jenkinsparse', parsingRulesPath: 'Jenkinsparse', showGraphs: true, unstableOnWarning: true, useProjectRule: true
                 sh 'git reset --hard'