diff --git a/go.mod b/go.mod
index 3e29295..88dd7a4 100644
--- a/go.mod
+++ b/go.mod
@@ -9,5 +9,5 @@ require (
 	github.com/muesli/mango v0.2.0
 	github.com/muesli/mango-pflag v0.1.0
 	github.com/muesli/roff v0.1.0
-	github.com/spf13/pflag v1.0.5
+	github.com/spf13/pflag v1.0.6
 )
diff --git a/go.sum b/go.sum
index dcf57a3..7fbc849 100644
--- a/go.sum
+++ b/go.sum
@@ -6,5 +6,5 @@ github.com/muesli/mango-pflag v0.1.0 h1:UADqbYgpUyRoBja3g6LUL+3LErjpsOwaC9ywvBWe
 github.com/muesli/mango-pflag v0.1.0/go.mod h1:YEQomTxaCUp8PrbhFh10UfbhbQrM/xJ4i2PB8VTLLW0=
 github.com/muesli/roff v0.1.0 h1:YD0lalCotmYuF5HhZliKWlIx7IEhiXeSfq7hNjFqGF8=
 github.com/muesli/roff v0.1.0/go.mod h1:pjAHQM9hdUUwm/krAfrLGgJkXJ+YuhtsfZ42kieB2Ig=
-github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
-github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
+github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=