diff --git a/types/introspection-field.go b/types/introspection-field.go
index 8f8c1d4..16b212a 100644
--- a/types/introspection-field.go
+++ b/types/introspection-field.go
@@ -1,4 +1,11 @@
 package types
 
+// IntrospectionField represents a field in a GraphQL object or interface type.
 type IntrospectionField struct {
+	Name              string                    `json:"name"`
+	Description       string                    `json:"description"`
+	Args              []IntrospectionInputValue `json:"args"`
+	Type              IntrospectionInputTypeRef `json:"type"`
+	IsDeprecated      bool                      `json:"isDeprecated"`
+	DeprecationReason string                    `json:"deprecationReason"`
 }
diff --git a/types/introspection-schema.go b/types/introspection-schema.go
index 687ebbc..4cd6c28 100644
--- a/types/introspection-schema.go
+++ b/types/introspection-schema.go
@@ -5,6 +5,6 @@ type IntrospectionSchema struct {
 	QueryType        IntrospectionObjectType  `json:"queryType"`
 	MutationType     IntrospectionObjectType  `json:"mutationType"`
 	SubscriptionType IntrospectionObjectType  `json:"subscriptionType"`
-	Types            IntrospectionType        `json:"types"`
+	Types            []IntrospectionType      `json:"types"`
 	Directives       []IntrospectionDirective `json:"directives"`
 }
diff --git a/types/introspection-type.go b/types/introspection-type.go
index 01b6128..6ddb252 100644
--- a/types/introspection-type.go
+++ b/types/introspection-type.go
@@ -10,41 +10,54 @@ type IntrospectionScalarType struct {
 	SpecifiedByURL string `json:"specifiedByURL"`
 }
 
+// TypeRef represents a reference to a type in the schema
+type TypeRef struct {
+	Name string `json:"name"`
+	Kind string `json:"kind"`
+}
+
 type IntrospectionObjectType struct {
-	Kind        string             `json:"kind"`
-	Name        string             `json:"name"`
-	Description string             `json:"description"`
-	Fields      IntrospectionField `json:"fields"`
-	Interfaces  interface{}        `json:"interfaces"`
+	Kind        string                `json:"kind"`
+	Name        string                `json:"name"`
+	Description string                `json:"description"`
+	Fields      []IntrospectionField  `json:"fields"`
+	Interfaces  []TypeRef             `json:"interfaces"`
 }
 
 type IntrospectionInterfaceType struct {
-	Kind        string             `json:"kind"`
-	Name        string             `json:"name"`
-	Description string             `json:"description"`
-	Fields      IntrospectionField `json:"fields"`
-	Interfaces  interface{}        `json:"interfaces"`
-	// possibleTypes IntrospectionObjectType    `json:"possibleTypes"`
+	Kind          string                `json:"kind"`
+	Name          string                `json:"name"`
+	Description   string                `json:"description"`
+	Fields        []IntrospectionField  `json:"fields"`
+	Interfaces    []TypeRef             `json:"interfaces"`
+	PossibleTypes []TypeRef             `json:"possibleTypes"`
 }
 
 type IntrospectionUnionType struct {
-	Kind          string                  `json:"kind"`
-	Name          string                  `json:"name"`
-	Description   string                  `json:"description"`
-	PossibleTypes IntrospectionObjectType `json:"possibleTypes"`
+	Kind          string    `json:"kind"`
+	Name          string    `json:"name"`
+	Description   string    `json:"description"`
+	PossibleTypes []TypeRef `json:"possibleTypes"`
+}
+
+type IntrospectionEnumValue struct {
+	Name              string `json:"name"`
+	Description       string `json:"description"`
+	IsDeprecated      bool   `json:"isDeprecated"`
+	DeprecationReason string `json:"deprecationReason"`
 }
 
 type IntrospectionEnumType struct {
-	Kind        string `json:"kind"`
-	Name        string `json:"name"`
-	Description string `json:"description"`
-	// enumValues  IntrospectionEnumValue `json:"enumValues"`
+	Kind        string                   `json:"kind"`
+	Name        string                   `json:"name"`
+	Description string                   `json:"description"`
+	EnumValues  []IntrospectionEnumValue `json:"enumValues"`
 }
 
 type IntrospectionInputObjectType struct {
-	Kind        string `json:"kind"`
-	Name        string `json:"name"`
-	Description string `json:"description"`
-	// inputFields IntrospectionInputValue `json:"inputFields"`
-	IsOneOf bool `json:"isOneOf"`
+	Kind        string                    `json:"kind"`
+	Name        string                    `json:"name"`
+	Description string                    `json:"description"`
+	InputFields []IntrospectionInputValue `json:"inputFields"`
+	IsOneOf     bool                      `json:"isOneOf"`
 }