diff --git a/.gitignore b/.gitignore
index eef9b26..c5fc218 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 node_modules/
 test/
+yarn.lock
 
-npm-debug.log
\ No newline at end of file
+npm-debug.log
diff --git a/index.js b/index.js
index a09fe0c..bfbdb6b 100644
--- a/index.js
+++ b/index.js
@@ -146,9 +146,10 @@ function CASAuthentication(options) {
 
     this.cas_url         = options.cas_url;
     var parsed_cas_url   = url.parse(this.cas_url);
+    
     this.request_client  = parsed_cas_url.protocol === 'http:' ? http : https;
     this.cas_host        = parsed_cas_url.hostname;
-    this.cas_port        = parsed_cas_url.protocol === 'http:' ? 80 : 443;
+    this.cas_port        = parsed_cas_url.port || (parsed_cas_url.protocol === 'http:' ? 80 : 443);
     this.cas_path        = parsed_cas_url.pathname;
 
     this.service_url     = options.service_url;
@@ -335,6 +336,10 @@ CASAuthentication.prototype._handleTicket = function(req, res, next) {
         };
     }
 
+    if (this.request_client === https && process.env.NODE_TLS_REJECT_UNAUTHORIZED != 0) {
+      process.env.NODE_TLS_REJECT_UNAUTHORIZED = 0;
+    }
+
     var request = this.request_client.request(requestOptions, function(response) {
         response.setEncoding( 'utf8' );
         var body = '';
diff --git a/package.json b/package.json
index c2d92db..c0f3120 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "xml2js": "^0.4.8"
   },
   "devDependencies": {
-    "express": "^4.12.3",
-    "express-session": "^1.11.1"
+    "express": "^4.16.2",
+    "express-session": "^1.15.6"
   }
 }