diff --git a/requirements.txt b/requirements.txt
index ec580473..f146fa3c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,4 +12,5 @@ wheel
 build
 argparse
 jsonschema
-referencing
\ No newline at end of file
+referencing
+pyld
\ No newline at end of file