diff --git a/converter/go.mod b/converter/go.mod
index 97466ae..4e210b4 100644
--- a/converter/go.mod
+++ b/converter/go.mod
@@ -5,7 +5,7 @@ go 1.21
 require (
 	github.com/sunshineplan/imgconv v0.0.0-00010101000000-000000000000
 	github.com/sunshineplan/tiff v0.0.0-20220128141034-29b9d69bd906
-	github.com/sunshineplan/utils v0.1.55
+	github.com/sunshineplan/utils v0.1.56
 )
 
 require (
diff --git a/converter/go.sum b/converter/go.sum
index 7f605ff..c75dbdc 100644
--- a/converter/go.sum
+++ b/converter/go.sum
@@ -17,8 +17,8 @@ github.com/sunshineplan/pdf v1.0.7 h1:62xlc079jh4tGLDjiihyyhwVFkn0IsxLyDpHplbG9E
 github.com/sunshineplan/pdf v1.0.7/go.mod h1:QsEmZCWBE3uFK8PCrM0pua1WDWLNU77YusiDEcY56OQ=
 github.com/sunshineplan/tiff v0.0.0-20220128141034-29b9d69bd906 h1:+yYRCj+PGQNnnen4+/Q7eKD2J87RJs+O39bjtHhPauk=
 github.com/sunshineplan/tiff v0.0.0-20220128141034-29b9d69bd906/go.mod h1:O+Ar7ouRbdfxLgoZLFz447/dvdM1NVKk1VpOQaijvAU=
-github.com/sunshineplan/utils v0.1.55 h1:Fx6UzZoOfCvuE+fqvcXuttqhHw34Ylz/wPBV3xy11AA=
-github.com/sunshineplan/utils v0.1.55/go.mod h1:7zhDUGgKo2FMFzs7j6IL7B/lh3BRuE7rb7R7IgGOAfc=
+github.com/sunshineplan/utils v0.1.56 h1:Urc8K2SLJ2ZvxmnRkwrXQbBKP7mCGZkfpbL8SueQBIw=
+github.com/sunshineplan/utils v0.1.56/go.mod h1:7zhDUGgKo2FMFzs7j6IL7B/lh3BRuE7rb7R7IgGOAfc=
 golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/image v0.14.0 h1:tNgSxAFe3jC4uYqvZdTr84SZoM1KfwdC9SKIFrLjFn4=
 golang.org/x/image v0.14.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=