diff --git a/cargo-deps.py b/cargo-deps.py
index 7a318be..0159451 100755
--- a/cargo-deps.py
+++ b/cargo-deps.py
@@ -79,8 +79,6 @@ for f in files:
         print_dep(md["name"], md["version"])
     if args.requires or args.conflicts:
         for dep in md["dependencies"]:
-            if dep["optional"]:
-                continue
             if dep["kind"] is not None:
                 # kind: build -> build dependencies
                 # kind: dev   -> test dependencies