diff --git a/go.mod b/go.mod
index b3ac102..be12587 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module go.wit.com/dev/alexflint/arg
 
 go 1.21.4
+
+require go.wit.com/dev/alexflint/scalar v1.2.1
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..a867b94
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+go.wit.com/dev/alexflint/scalar v1.2.1 h1:loXOcbVnd+8YeJRLey+XXidecBiedMDO00zQ26TvKNs=
+go.wit.com/dev/alexflint/scalar v1.2.1/go.mod h1:+rYsfxqdI2cwA8kJ7GCMwWbNJvfvWUurOCXLiwdTtSs=