diff --git a/cmd/internal/gen/centrifuge.go b/cmd/internal/gen/centrifuge.go
index 87c09f272..ddef63429 100644
--- a/cmd/internal/gen/centrifuge.go
+++ b/cmd/internal/gen/centrifuge.go
@@ -12,6 +12,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"reflect"
 	"sort"
 	"strings"
 
@@ -183,15 +184,15 @@ func (c Centrifuge) writeStruct(name string, obj *types.Struct, rootPkg string,
 			continue
 		}
 
+		values, ok := lookupTagValue(obj.Tag(i), "json")
+		if len(values) > 0 && values[0] == "-" {
+			continue
+		}
+
 		b.WriteString(fmt.Sprintf("\t%s %s", field.Name(), fType))
 
-		tags := obj.Tag(i)
-		if tags != "" {
-			tg := extractJSONTag(tags)
-
-			if tg != `json:"-"` {
-				b.WriteString(fmt.Sprintf(" `%s`", tg))
-			}
+		if ok {
+			b.WriteString(fmt.Sprintf(" `json:\"%s\"`", strings.Join(values, ",")))
 		}
 
 		b.WriteString("\n")
@@ -202,16 +203,19 @@ func (c Centrifuge) writeStruct(name string, obj *types.Struct, rootPkg string,
 	return b.String()
 }
 
-func extractJSONTag(value string) string {
-	fields := strings.Fields(value)
-
-	for _, field := range fields {
-		if strings.HasPrefix(field, `json:"`) {
-			return field
-		}
+func lookupTagValue(raw, key string) ([]string, bool) {
+	value, ok := reflect.StructTag(raw).Lookup(key)
+	if !ok {
+		return nil, ok
 	}
 
-	return ""
+	values := strings.Split(value, ",")
+
+	if len(values) < 1 {
+		return nil, true
+	}
+
+	return values, true
 }
 
 func extractPackage(t types.Type) string {
diff --git a/go.mod b/go.mod
index 2e47b13ec..cdeee2366 100644
--- a/go.mod
+++ b/go.mod
@@ -73,7 +73,7 @@ require (
 	github.com/tinylib/msgp v1.0.2 // indirect
 	github.com/traefik/gziphandler v1.1.2-0.20210212101304-175e0fad6888
 	github.com/traefik/paerser v0.1.4
-	github.com/traefik/yaegi v0.9.19
+	github.com/traefik/yaegi v0.9.20
 	github.com/uber/jaeger-client-go v2.29.1+incompatible
 	github.com/uber/jaeger-lib v2.2.0+incompatible
 	github.com/unrolled/render v1.0.2
diff --git a/go.sum b/go.sum
index 5f1d9d3fb..8c893918a 100644
--- a/go.sum
+++ b/go.sum
@@ -1174,8 +1174,8 @@ github.com/traefik/gziphandler v1.1.2-0.20210212101304-175e0fad6888 h1:GMY0C+M/w
 github.com/traefik/gziphandler v1.1.2-0.20210212101304-175e0fad6888/go.mod h1:sLqwoN03tkluITKL+lPEZbfsJQU2suYoKbrR/HeV9aM=
 github.com/traefik/paerser v0.1.4 h1:/IXjV04Gf6di51H8Jl7jyS3OylsLjIasrwXIIwj1aT8=
 github.com/traefik/paerser v0.1.4/go.mod h1:FIdQ4Y92ulQUGSeZgxchtBKEcLw1o551PMNg9PoIq/4=
-github.com/traefik/yaegi v0.9.19 h1:ze01+pVtKmxSogy0wlAPSvm2LoDYuZj2LdH3S6GxHcQ=
-github.com/traefik/yaegi v0.9.19/go.mod h1:FAYnRlZyuVlEkvnkHq3bvJ1lW5be6XuwgLdkYgYG6Lk=
+github.com/traefik/yaegi v0.9.20 h1:G05/iDMD3cepEr9QsVGpmCc3N8FQCdUWA3Vlff2WgbA=
+github.com/traefik/yaegi v0.9.20/go.mod h1:FAYnRlZyuVlEkvnkHq3bvJ1lW5be6XuwgLdkYgYG6Lk=
 github.com/transip/gotransip/v6 v6.2.0 h1:0Z+qVsyeiQdWfcAUeJyF0IEKAPvhJwwpwPi2WGtBIiE=
 github.com/transip/gotransip/v6 v6.2.0/go.mod h1:pQZ36hWWRahCUXkFWlx9Hs711gLd8J4qdgLdRzmtY+g=
 github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 h1:G3dpKMzFDjgEh2q1Z7zUUtKa8ViPtH+ocF0bE0g00O8=