diff --git a/shadowsocks/stop.sh b/shadowsocks/stop.sh
index 495b813..d7d2958 100644
--- a/shadowsocks/stop.sh
+++ b/shadowsocks/stop.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
 
 python_ver=$(ls /usr/bin|grep -e "^python[23]\.[1-9]\+$"|tail -1)
-eval $(ps -ef | grep "[0-9]  ${python_ver} server\\.py a" | awk '{print "kill "$2}')
+eval $(ps -ef | grep "[0-9] ${python_ver} server\\.py a" | awk '{print "kill "$2}')
 
diff --git a/stop.sh b/stop.sh
index 927e2f0..56567da 100755
--- a/stop.sh
+++ b/stop.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
 
 python_ver=$(ls /usr/bin|grep -e "^python[23]\.[1-9]\+$"|tail -1)
-eval $(ps -ef | grep "[0-9]  ${python_ver} server\\.py m" | awk '{print "kill "$2}')
+eval $(ps -ef | grep "[0-9] ${python_ver} server\\.py m" | awk '{print "kill "$2}')