diff --git a/lib/pipedrive/base.rb b/lib/pipedrive/base.rb
index 9a0adb0..7879d30 100644
--- a/lib/pipedrive/base.rb
+++ b/lib/pipedrive/base.rb
@@ -16,7 +16,7 @@ class Base < OpenStruct
 
     include HTTParty
     
-    base_uri 'api.pipedrive.com/v1'
+    base_uri 'https://api.pipedrive.com/v1'
     headers HEADERS
     format :json