diff --git a/go.mod b/go.mod
index 71d3cae..f05c1bd 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/birkland/ocfl
 
 require (
 	github.com/go-test/deep v1.0.4
-	github.com/karrick/godirwalk v1.13.0
+	github.com/karrick/godirwalk v1.15.6
 	github.com/pkg/errors v0.8.1
 	github.com/urfave/cli v1.20.0
 	golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4
diff --git a/go.sum b/go.sum
index 23a05ef..f2a5161 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ github.com/karrick/godirwalk v1.7.7 h1:lLkPCA+C0u1pI4fLFseaupvh5/THlPJIqSPmnGGVi
 github.com/karrick/godirwalk v1.7.7/go.mod h1:2c9FRhkDxdIbgkOnCEvnSWs71Bhugbl46shStcFDJ34=
 github.com/karrick/godirwalk v1.13.0 h1:GJq8GHQEAPsjwqfGhLNXBO5P0dS2HYdDRVWe+P4E/EQ=
 github.com/karrick/godirwalk v1.13.0/go.mod h1:H5KPZjojv4lE+QYImBI8xVtrBRgYrIVsaRPx4tDPEn4=
+github.com/karrick/godirwalk v1.15.6 h1:Yf2mmR8TJy+8Fa0SuQVto5SYap6IF7lNVX4Jdl8G1qA=
+github.com/karrick/godirwalk v1.15.6/go.mod h1:j4mkqPuvaLI8mp1DroR3P6ad7cyYd4c1qeJ3RV7ULlk=
 github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=