diff --git a/go.mod b/go.mod
index 80ffabf..a18a1cf 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/issue9/source
 go 1.22.0
 
 require (
-	github.com/issue9/assert/v4 v4.3.0
+	github.com/issue9/assert/v4 v4.3.1
 	github.com/issue9/errwrap v0.3.2
 	golang.org/x/mod v0.21.0
 )
diff --git a/go.sum b/go.sum
index 03f39ef..8503cb5 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/issue9/assert/v4 v4.3.0 h1:W3XDKmttsfzihYGxJ9rJoL2ViJgWERB9IxfHcxjv65U=
-github.com/issue9/assert/v4 v4.3.0/go.mod h1:v7qDRXi7AsaZZNh8eAK2rkLJg5/clztqQGA1DRv9Lv4=
+github.com/issue9/assert/v4 v4.3.1 h1:dHYODk1yV7j/1baIB6K6UggI4r1Hfuljqic7PaDbwLg=
+github.com/issue9/assert/v4 v4.3.1/go.mod h1:v7qDRXi7AsaZZNh8eAK2rkLJg5/clztqQGA1DRv9Lv4=
 github.com/issue9/errwrap v0.3.2 h1:7KEme9Pfe75M+sIMcPCn/DV90wjnOcRbO4DXVAHj3Fw=
 github.com/issue9/errwrap v0.3.2/go.mod h1:KcCLuUGiffjooLCUjL89r1cyO8/HT/VRcQrneO53N3A=
 golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=