diff --git a/lib/runner/strategy/poseidon.rb b/lib/runner/strategy/poseidon.rb
index c5e7c149..c4df9c16 100644
--- a/lib/runner/strategy/poseidon.rb
+++ b/lib/runner/strategy/poseidon.rb
@@ -114,7 +114,7 @@ class Runner::Strategy::Poseidon < Runner::Strategy
     copy = files.map do |file|
       {
         path: file.filepath,
-        content: Base64.strict_encode64(file.content.presence || file.native_file.read),
+        content: Base64.strict_encode64(file.content.presence || file.native_file.read || ''),
       }
     end