diff --git a/certs/client.key b/certs/client.key
deleted file mode 100644
index e358c55..0000000
--- a/certs/client.key
+++ /dev/null
@@ -1,28 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDts5LmWeGx74un
-YV6ka4ls3UhG4y1J9P0sgLphhTiNfPzEkcDBlMOkkMBl+bLZ3abtkmvXTMlwhhTJ
-BthMp59TWJF8DsjUcnm3Sky4FLfCmbMdK9zCC6u1ZaEsjB/zQwRfBGEkWeo4GEdX
-TpoQtEAyfnWbvVMjW/kr1MzlzG49yjuwt/CjS83BfJzAXuWfBxGrUd2LjkjqxM5U
-eLb43kOkib5P5lEXMbMO8drLMqR9BqvfryMcF4y7Lo1PxOQqvt2bx6Q1UT2EhmYP
-JdqcB2lm2XQSrBYRAa8nxZTJ8WNiIrJDA/kU2bCHSrSWeZj2u/jxMDNh/Nl6lNhb
-456pu1ZpAgMBAAECggEAB2Jc+vwfU15YRbX0EU0IQEzGg5ySlK8q6fCXeaiVvMAo
-KmNxwWxsQHxBBy9LiPzxBC/YhaAhy4sAHHedOBJmqW7sBBaB0tG56hcBjPVoeP/l
-LSU77tObJ7U1ctNpOa7NtQrx3pskIs55nDgkTUZgOSwDCM3H8PuuNlhJGOQcfPMF
-ntPteR1NnlVLqf4q6Pteh99BHmCT4cYIaBhPeO4OiMP3zR1UBvfkEzHeo8XP9C3R
-Ub4vZexo5X3Bbg8TKQVfgjGE65+gLn7aWAnhX6Aj5HonW3WutodJFz96Ct5XYYCw
-4V+mGcGeO92gJDI4/mO53NikCiZyyTqLX1zSmX5moQKBgQD+JbF4XglU7hVsTVxP
-Z+PwdRyWvxPEODVR862DFCi6ORPhCaNJClWJBmZb3nR9UFpuHrmDxIffZjtYc4Zp
-bayKCeX4egkUXmD/L6rmc32InlxVWXww8hxHC33udMs/o5qAbAd5HASMPn0dPwZ+
-lVCockrvnMhjWr+zcgZSTGsk+QKBgQDvbzA4Xg8WbRS5UIEwi3Q18HV4DVOEKS1f
-wXjy1WrXE8av4bm0FzkaW3Uqff29TQnFvxf+vtnVxTKMY7hJCZov1G/5sc2zwPNz
-OvNEsf5i2S+G0sqhTw4x5qnWrcppNx6zk4sIFByt+/i1ktEfpcjgaJ4sCriCRzCu
-miP4UZPI8QKBgQDaUrEZMNcdYYV/yxkwkZPLXh+YFD87wfl0FDwLLYcrKps8J5Zg
-yYLfOmM2KmyxthRpIvXFD1CVhfIXMu7VpMSitIwdH2CrYcQ7k8xhOfcuJLQ3Ea9R
-MLtAAMxGy4hKfBXemm71CC+T9p5uQFUo6sYmXkCnhGzUhQHHen2Zt1IXqQKBgQCi
-s5W61/+8p4crnk8Lo9fmR24rlDKqXijdJuV/bhLZ8DBVmDfO7vD4vilSJKdmGZGI
-dKBjlWEFaKk+yQyTZRkHY35r2K0Fdxp3tRlWFvXcSeWH4nmbP9NPiYTjwtkGwlP0
-h1A0vyX1/IE3MXs13DwyciT5nJdgv+uO2mOS/CxGoQKBgQC2Kp+bOOGsOWeoR8Od
-/pPdgWpLo4cuRVVroF+Dnrm2KYnSXe+z6a4M967fhw9eKE+es8kS57HEVNbQmbPd
-XrtW9xaBSv22EmzuzAlwExQ+LDaKqw1eK1GpOcRyK0OjbsdJuAWMsaiEw92iucc3
-GDqx7l13NHU3kwOT0z14KelToQ==
------END PRIVATE KEY-----
diff --git a/certs/client.pem b/certs/client.pem
deleted file mode 100644
index 045d320..0000000
--- a/certs/client.pem
+++ /dev/null
@@ -1,23 +0,0 @@
------BEGIN CERTIFICATE-----
-MIID6TCCAtGgAwIBAgIUcXh6hbhTApkc3ayNyLuuqnzaa1gwDQYJKoZIhvcNAQEL
-BQAwgYMxCzAJBgNVBAYTAkRFMQwwCgYDVQQIDANOUlcxDjAMBgNVBAcMBUVhcnRo
-MRcwFQYDVQQKDA5SYW5kb20gQ29tcGFueTELMAkGA1UECwwCSVQxETAPBgNVBAMM
-CHZ0dW4ub3JnMR0wGwYJKoZIhvcNAQkBFg5hZG1pbkB2dHVuLm9yZzAeFw0yMjA1
-MTcxMTUzNTFaFw0zMjA1MTQxMTUzNTFaMIGDMQswCQYDVQQGEwJERTEMMAoGA1UE
-CAwDTlJXMQ4wDAYDVQQHDAVFYXJ0aDEXMBUGA1UECgwOUmFuZG9tIENvbXBhbnkx
-CzAJBgNVBAsMAklUMREwDwYDVQQDDAh2dHVuLm9yZzEdMBsGCSqGSIb3DQEJARYO
-YWRtaW5AdnR1bi5vcmcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDt
-s5LmWeGx74unYV6ka4ls3UhG4y1J9P0sgLphhTiNfPzEkcDBlMOkkMBl+bLZ3abt
-kmvXTMlwhhTJBthMp59TWJF8DsjUcnm3Sky4FLfCmbMdK9zCC6u1ZaEsjB/zQwRf
-BGEkWeo4GEdXTpoQtEAyfnWbvVMjW/kr1MzlzG49yjuwt/CjS83BfJzAXuWfBxGr
-Ud2LjkjqxM5UeLb43kOkib5P5lEXMbMO8drLMqR9BqvfryMcF4y7Lo1PxOQqvt2b
-x6Q1UT2EhmYPJdqcB2lm2XQSrBYRAa8nxZTJ8WNiIrJDA/kU2bCHSrSWeZj2u/jx
-MDNh/Nl6lNhb456pu1ZpAgMBAAGjUzBRMB0GA1UdDgQWBBQhXIWnyKA4h8m8r5V/
-35G6GswRkjAfBgNVHSMEGDAWgBQhXIWnyKA4h8m8r5V/35G6GswRkjAPBgNVHRMB
-Af8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQDe0kr2eAEliqtWtdEI/S39Nz2i
-EfMYiHWPV1dDmW6zCu0t39qZlf/kSTLvFVY5x7TIbRoINb9TPavacQOXUw1xdafI
-AneqTjMEH2ZjDDgnNVCZLTCGDAvw/CfssleNuYLnnhYbwhliU1vAG00tVkjNe1GY
-Z/NAVykwHRQMG6OgATQ6W44l7CI5n++T7xUyiXvSeqYm5KT6bQ6KCPDE37CLkKaM
-AKrWCAYXZZBuomSVHNU1SN7GcZJLXcmRQEartF4CzNQq6xAAMo1cqE4XPYdjK4zw
-d4h4lFVv5KdC1uDe3oKtK5BB3x1lHMz7Hnq0+r9lSF/55c14kUr7IPd80Of8
------END CERTIFICATE-----
diff --git a/certs/server.key b/certs/server.key
new file mode 100644
index 0000000..44ccb36
--- /dev/null
+++ b/certs/server.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/certs/server.pem b/certs/server.pem
new file mode 100644
index 0000000..b4e6993
--- /dev/null
+++ b/certs/server.pem
@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/main.go b/main.go
index 35408ee..54069ae 100644
--- a/main.go
+++ b/main.go
@@ -38,8 +38,8 @@ func main() {
 	flag.BoolVar(&config.GlobalMode, "g", false, "client global mode")
 	flag.BoolVar(&config.Obfs, "obfs", false, "enable data obfuscation")
 	flag.IntVar(&config.Timeout, "t", 30, "dial timeout in seconds")
-	flag.StringVar(&config.TLSCertificateFilePath, "certificate", "", "tls certificate file path")
-	flag.StringVar(&config.TLSCertificateKeyFilePath, "privatekey", "", "tls certificate key file path")
+	flag.StringVar(&config.TLSCertificateFilePath, "certificate", "./certs/server.pem", "tls certificate file path")
+	flag.StringVar(&config.TLSCertificateKeyFilePath, "privatekey", "./certs/server.key", "tls certificate key file path")
 	flag.StringVar(&config.TLSSni, "sni", "", "tls handshake sni")
 	flag.BoolVar(&config.TLSInsecureSkipVerify, "isv", false, "tls insecure skip verify")
 	flag.Parse()
diff --git a/scripts/make_certs.sh b/scripts/make_certs.sh
index e349f36..271638e 100755
--- a/scripts/make_certs.sh
+++ b/scripts/make_certs.sh
@@ -4,5 +4,5 @@ domain="vtun.org"
 email="admin@vtun.org"
 
 echo "make cert"
-openssl req -new -nodes -x509 -out ./certs/client.pem -keyout ./certs/client.key -days 3650 -subj "/C=DE/ST=NRW/L=Earth/O=Random Company/OU=IT/CN=$domain/emailAddress=$email"
+openssl req -new -nodes -x509 -out ./certs/server.pem -keyout ./certs/server.key -days 3650 -subj "/C=DE/ST=NRW/L=Earth/O=Random Company/OU=IT/CN=$domain/emailAddress=$email"