diff --git a/.fernignore b/.fernignore
index c2cbbf0..bca19bd 100644
--- a/.fernignore
+++ b/.fernignore
@@ -1,3 +1,10 @@
 # Specify files that shouldn't be modified by Fern
 README.md
 LICENSE
+
+# Temporarily ignored for the OptionalOrNull helper.
+optional.go
+optional_test.go
+
+# Temporarily ignored to fix core.Optional -> core.DateTime mapping.
+issue_trigger.go