diff --git a/lib/config/defaultSSL.js b/lib/config/defaultSSL.js
index 1f1d559..362c62a 100644
--- a/lib/config/defaultSSL.js
+++ b/lib/config/defaultSSL.js
@@ -12,6 +12,6 @@ function getFile (path) {
 module.exports = {
   sslkeypath: getFile('/run/secrets/key.pem'),
   sslcertpath: getFile('/run/secrets/cert.pem'),
-  sslcapath: getFile('/run/secrets/ca.pem'),
+  sslcapath: getFile('/run/secrets/ca.pem') !== undefined ? [getFile('/run/secrets/ca.pem')] : [],
   dhparampath: getFile('/run/secrets/dhparam.pem')
 }
diff --git a/lib/config/index.js b/lib/config/index.js
index 3ac3de5..a14f319 100644
--- a/lib/config/index.js
+++ b/lib/config/index.js
@@ -96,7 +96,10 @@ config.isSAMLEnable = config.saml.idpSsoUrl
 config.isPDFExportEnable = config.allowpdfexport
 
 // generate correct path
-config.sslcapath = path.join(appRootPath, config.sslcapath)
+config.sslcapath.forEach(function (capath, i, array) {
+  array[i] = path.resolve(appRootPath, capath)
+})
+
 config.sslcertpath = path.join(appRootPath, config.sslcertpath)
 config.sslkeypath = path.join(appRootPath, config.sslkeypath)
 config.dhparampath = path.join(appRootPath, config.dhparampath)