diff --git a/lib/dpl/providers/cloudformation.rb b/lib/dpl/providers/cloudformation.rb
index <HASH>..<HASH> 100644
--- a/lib/dpl/providers/cloudformation.rb
+++ b/lib/dpl/providers/cloudformation.rb
@@ -182,7 +182,7 @@ module Dpl
         end
 
         def credentials
-          Aws::Credentials.new(access_key_id, secret_access_key, session_token)
+          Aws::Credentials.new(access_key_id, secret_access_key)
         end
 
         def assume_role(params)
removed session_token as parameter is now missing