diff --git a/go.mod b/go.mod
index a300006..7162f00 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module go.osspkg.com/encrypt
 go 1.25.0
 
 require (
-	go.osspkg.com/casecheck v0.3.0
+	go.osspkg.com/casecheck v0.3.1
 	go.osspkg.com/errors v0.4.0
 	go.osspkg.com/ioutils v0.7.4
 	go.osspkg.com/random v0.5.0
diff --git a/go.sum b/go.sum
index 67d3b8c..330e281 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-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=
 go.osspkg.com/errors v0.4.0 h1:E17+WyUzTXEHCTxGm8lOMPOOojzHG1lsOuQtTVGoATQ=
 go.osspkg.com/errors v0.4.0/go.mod h1:s75ZovPemYtrCtRPVsbQNq9MgMbmLMK1NEypr+uwjXI=
 go.osspkg.com/ioutils v0.7.4 h1:Z8Y4jYYmLGWcvHZMLjbai+s48GmHxjMuepsxZcjF5X4=