diff --git a/plugin/protoc-gen-marshal-zap/module.go b/plugin/protoc-gen-marshal-zap/module.go
index dee7889..fb1b09d 100644
--- a/plugin/protoc-gen-marshal-zap/module.go
+++ b/plugin/protoc-gen-marshal-zap/module.go
@@ -6,7 +6,6 @@ import (
 	"os"
 	"strings"
 
-	"github.com/golang/protobuf/protoc-gen-go/generator"
 	marshal_zap "github.com/kei2100/protoc-gen-marshal-zap"
 	pgs "github.com/lyft/protoc-gen-star"
 	pgsgo "github.com/lyft/protoc-gen-star/lang/go"
@@ -98,7 +97,7 @@ func processFields(fields []pgs.Field) ([]*protoField, error) {
 		}
 		pf.IsMask = mask
 
-		pf.Accessor = generator.CamelCase(field.Name().String())
+		pf.Accessor = pgsgo.PGGUpperCamelCase(field.Name()).String()
 		if _, ok := reservedKeywords[pf.Accessor]; ok {
 			pf.Accessor += "_"
 		}
diff --git a/test/types/types.pb.go b/test/types/types.pb.go
index cb86b9b..7b88354 100644
--- a/test/types/types.pb.go
+++ b/test/types/types.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
-// 	protoc        v3.17.3
+// 	protoc-gen-go v1.25.0-devel
+// 	protoc        v3.15.8
 // source: test/types/types.proto
 
 package types
diff --git a/test/types/types.proto b/test/types/types.proto
index dbf5de5..1b864d5 100644
--- a/test/types/types.proto
+++ b/test/types/types.proto
@@ -92,4 +92,4 @@ message OtherType2 {
     string nested_string_val = 1;
     string nested_secret_val = 2 [(marshal_zap.mask) = true];
   }
-}
\ No newline at end of file
+}