diff --git a/go.mod b/go.mod
index 68ebc1e..2dc3c77 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.16
 require (
 	github.com/akutz/gosync v0.1.0
 	github.com/akutz/memconn v0.1.0
-	github.com/container-storage-interface/spec v1.3.0
+	github.com/container-storage-interface/spec v1.4.0
 	github.com/golang/protobuf v1.5.2
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/onsi/ginkgo v1.4.0
diff --git a/go.sum b/go.sum
index 24c0cad..e371bc5 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,8 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/container-storage-interface/spec v1.3.0 h1:wMH4UIoWnK/TXYw8mbcIHgZmB6kHOeIsYsiaTJwa6bc=
-github.com/container-storage-interface/spec v1.3.0/go.mod h1:6URME8mwIBbpVyZV93Ce5St17xBiQJQY67NDsuohiy4=
+github.com/container-storage-interface/spec v1.4.0 h1:ozAshSKxpJnYUfmkpZCTYyF/4MYeYlhdXbAvPvfGmkg=
+github.com/container-storage-interface/spec v1.4.0/go.mod h1:6URME8mwIBbpVyZV93Ce5St17xBiQJQY67NDsuohiy4=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd/v22 v22.3.2 h1:D9/bQk5vlXQFZ6Kwuu6zaiXJ9oTPe68++AzAJc1DzSI=
diff --git a/middleware/specvalidator/spec_validator.go b/middleware/specvalidator/spec_validator.go
index 479c189..22ef6c9 100644
--- a/middleware/specvalidator/spec_validator.go
+++ b/middleware/specvalidator/spec_validator.go
@@ -770,7 +770,7 @@ func validateVolumeCapabilitiesArg(
 }
 
 const (
-	maxFieldString = 128
+	maxFieldString = 192
 	maxFieldMap    = 4096
 )