diff --git a/go.mod b/go.mod
index e4afa5d..60c0176 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module go.osspkg.com/do
 go 1.25.0
 
 require (
-	go.osspkg.com/casecheck v0.3.0
+	go.osspkg.com/casecheck v0.3.1
 	golang.org/x/sync v0.21.0
 )
diff --git a/go.sum b/go.sum
index 4b03aa7..471ea65 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-go.osspkg.com/casecheck v0.3.0 h1:x15blEszElbrHrEH5H02JIIhGIg/lGZzIt1kQlD3pwM=
-go.osspkg.com/casecheck v0.3.0/go.mod h1:TRFXDMFJEOtnlp3ET2Hix3osbxwPWhvaiT/HfD3+gBA=
+go.osspkg.com/casecheck v0.3.1 h1:mxg1WaWy/tv7J05jvf5Idy3ydDYbac3gOOV9NPdjxvU=
+go.osspkg.com/casecheck v0.3.1/go.mod h1:TRFXDMFJEOtnlp3ET2Hix3osbxwPWhvaiT/HfD3+gBA=
 golang.org/x/sync v0.21.0 h1:HLII4xRRTtCRkxYp4HNFF0Js/Og6q2i++KXbg0gHCwM=
 golang.org/x/sync v0.21.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=