diff --git a/SHOULDERS.md b/SHOULDERS.md
index 9606df1..50318cc 100644
--- a/SHOULDERS.md
+++ b/SHOULDERS.md
@@ -18,3 +18,9 @@ Thank you to the following **GIANTS**:
 * [github.com/markbates/oncer](https://godoc.org/github.com/markbates/oncer)
 
 * [github.com/pkg/errors](https://godoc.org/github.com/pkg/errors)
+
+* [github.com/rogpeppe/go-internal/modfile](https://godoc.org/github.com/rogpeppe/go-internal/modfile)
+
+* [github.com/rogpeppe/go-internal/module](https://godoc.org/github.com/rogpeppe/go-internal/module)
+
+* [github.com/rogpeppe/go-internal/semver](https://godoc.org/github.com/rogpeppe/go-internal/semver)
diff --git a/version.go b/version.go
index 6eb08b6..e8d5dea 100644
--- a/version.go
+++ b/version.go
@@ -1,3 +1,3 @@
 package packr
 
-const Version = "v1.21.5"
+const Version = "v1.21.6"