diff --git a/go.mod b/go.mod
index 0cce90ef6..82cc34489 100644
--- a/go.mod
+++ b/go.mod
@@ -49,7 +49,7 @@ require (
 require (
 	github.com/bufbuild/buf v1.35.1
 	github.com/creachadair/atomicfile v0.2.6
-	github.com/creachadair/taskgroup v0.3.2
+	github.com/creachadair/taskgroup v0.12.0
 	github.com/go-pkgz/jrpc v0.2.0
 	github.com/google/go-cmp v0.6.0
 	github.com/vektra/mockery/v2 v2.46.2
diff --git a/go.sum b/go.sum
index 0c13d9170..2a45e152c 100644
--- a/go.sum
+++ b/go.sum
@@ -219,8 +219,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lV
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creachadair/atomicfile v0.2.6 h1:FgYxYvGcqREApTY8Nxg8msM6P/KVKK3ob5h9FaRUTNg=
 github.com/creachadair/atomicfile v0.2.6/go.mod h1:BRq8Une6ckFneYXZQ+kO7p1ZZP3I2fzVzf28JxrIkBc=
-github.com/creachadair/taskgroup v0.3.2 h1:zlfutDS+5XG40AOxcHDSThxKzns8Tnr9jnr6VqkYlkM=
-github.com/creachadair/taskgroup v0.3.2/go.mod h1:wieWwecHVzsidg2CsUnFinW1faVN4+kq+TDlRJQ0Wbk=
+github.com/creachadair/taskgroup v0.12.0 h1:AWk1vgMp1VjmwRUJkbX/XZxDRI+gCWhVr+Slj2LeJ+A=
+github.com/creachadair/taskgroup v0.12.0/go.mod h1:9oDDPt/5QPS4iylvPMC81GRlj+1je8AFDbjUh4zaQWo=
 github.com/creachadair/tomledit v0.0.23 h1:ohYJjMsxwzj4dDzKaBWFbWH5J+3LO/8CYnlVY+baBWA=
 github.com/creachadair/tomledit v0.0.23/go.mod h1:cIu/4x5L855oSRejIqr+WRFh+mv9g4fWLiUFaApYn/Y=
 github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=