diff --git a/config/initializers/hexapdf.rb b/config/initializers/hexapdf.rb
new file mode 100644
index 00000000..a734508a
--- /dev/null
+++ b/config/initializers/hexapdf.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+# fix NoMethodError: undefined method `field_value' for #<HexaPDF::Type::AcroForm::Field
+module HexaPDF
+  module Type
+    module AcroForm
+      class Field
+        def field_value
+          ''
+        end
+      end
+    end
+  end
+end