diff --git a/jenkins.sh b/jenkins.sh
index 98c39bc50b..cef82c1740 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -23,7 +23,7 @@ if [[ ! -d ${stanford_corenlp_package_name} ]]; then
 	rm ${stanford_corenlp_package_zip_name}
 	ln -s ${stanford_corenlp_package_name} 'stanford-corenlp'
 	# Kill all Java instances.
-	pkill -f 'java '
+	pkill -f '*edu.stanford.nlp.pipeline.StanfordCoreNLPServer*'
 	cd stanford-corenlp
 	nohup java -mx4g -cp "*" edu.stanford.nlp.pipeline.StanfordCoreNLPServer -port 9000 -timeout 15000 &
 	# Log the job ID and kill it before the end.