diff --git a/tools/rbcrun/go.mod b/tools/rbcrun/go.mod
index a029eb4..5ae2972 100644
--- a/tools/rbcrun/go.mod
+++ b/tools/rbcrun/go.mod
@@ -1,9 +1,6 @@
 module rbcrun
 
-require (
-	github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d // indirect
-	go.starlark.net v0.0.0-20201006213952-227f4aabceb5
-)
+require go.starlark.net v0.0.0-20201006213952-227f4aabceb5
 
 replace go.starlark.net => ../../../../external/starlark-go