diff --git a/openapi/entities.go b/openapi/entities.go
index a553b93..9b658a5 100644
--- a/openapi/entities.go
+++ b/openapi/entities.go
@@ -10,6 +10,8 @@ type ContentUnit struct {
 	IsDefault bool // IsDefault indicates if this content unit is the default response.
 
 	Description string // Description provides a description for the content unit.
+
+	Encoding map[string]string // Encoding maps property names to content types
 }
 
 // Contact represents contact information for the API.
diff --git a/operation.go b/operation.go
index d33067c..b6089c1 100644
--- a/operation.go
+++ b/operation.go
@@ -8,6 +8,8 @@ import (
 	specopenapi "github.com/oaswrap/spec/openapi"
 	"github.com/oaswrap/spec/option"
 	"github.com/swaggest/openapi-go"
+	"github.com/swaggest/openapi-go/openapi3"
+	"github.com/swaggest/openapi-go/openapi31"
 )
 
 var _ operationContext = (*operationContextImpl)(nil)
@@ -81,6 +83,28 @@ func (oc *operationContextImpl) build() openapi.OperationContext {
 	return oc.op
 }
 
+func stringMapToEncodingMap3(enc map[string]string) map[string]openapi3.Encoding {
+	res := map[string]openapi3.Encoding{}
+	for k, v := range enc {
+		rv := v
+		res[k] = openapi3.Encoding{
+			ContentType: &rv,
+		}
+	}
+	return res
+}
+
+func stringMapToEncodingMap31(enc map[string]string) map[string]openapi31.Encoding {
+	res := map[string]openapi31.Encoding{}
+	for k, v := range enc {
+		rv := v
+		res[k] = openapi31.Encoding{
+			ContentType: &rv,
+		}
+	}
+	return res
+}
+
 func (oc *operationContextImpl) buildRequestOpts(req *specopenapi.ContentUnit) ([]openapi.ContentOption, string) {
 	log := fmt.Sprintf("%T", req.Structure)
 	var opts []openapi.ContentOption
@@ -94,6 +118,24 @@ func (oc *operationContextImpl) buildRequestOpts(req *specopenapi.ContentUnit) (
 		opts = append(opts, openapi.WithContentType(req.ContentType))
 		log += fmt.Sprintf(" (Content-Type: %s)", req.ContentType)
 	}
+	opts = append(opts, func(cu *openapi.ContentUnit) {
+		cu.Customize = func(cor openapi.ContentOrReference) {
+			switch v := cor.(type) {
+			case *openapi3.RequestBodyOrRef:
+				content := map[string]openapi3.MediaType{}
+				for k, val := range v.RequestBody.Content {
+					content[k] = *val.WithEncoding(stringMapToEncodingMap3(req.Encoding))
+				}
+				v.RequestBody.WithContent(content)
+			case *openapi31.RequestBodyOrReference:
+				content := map[string]openapi31.MediaType{}
+				for k, val := range v.RequestBody.Content {
+					content[k] = *val.WithEncoding(stringMapToEncodingMap31(req.Encoding))
+				}
+				v.RequestBody.WithContent(content)
+			}
+		}
+	})
 	return opts, log
 }
 
diff --git a/option/content.go b/option/content.go
index a4e3fbe..8c93367 100644
--- a/option/content.go
+++ b/option/content.go
@@ -28,3 +28,12 @@ func ContentDefault(isDefault ...bool) ContentOption {
 		cu.IsDefault = util.Optional(true, isDefault...)
 	}
 }
+
+func ContentEncoding(prop, enc string) ContentOption {
+	return func(cu *openapi.ContentUnit) {
+		if cu.Encoding == nil {
+			cu.Encoding = map[string]string{}
+		}
+		cu.Encoding[prop] = enc
+	}
+}