diff --git a/api/api.go b/api/api.go
index b240c875..81e10b31 100644
--- a/api/api.go
+++ b/api/api.go
@@ -63,6 +63,7 @@ type (
 		MemLimit     int64                `json:"mem_limit,omitempty"`
 		Network      string               `json:"network,omitempty"`
 		Networks     []string             `json:"networks,omitempty"`
+		PortBindings map[string]string    `json:"port_bindings,omitempty"` // Host port to container port mapping
 		Privileged   bool                 `json:"privileged,omitempty"`
 		Pull         spec.PullPolicy      `json:"pull,omitempty"`
 		ShmSize      int64                `json:"shm_size,omitempty"`
diff --git a/engine/docker/convert.go b/engine/docker/convert.go
index 2290f8a1..2ebd8722 100644
--- a/engine/docker/convert.go
+++ b/engine/docker/convert.go
@@ -12,6 +12,7 @@ import (
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/api/types/network"
+	"github.com/docker/go-connections/nat"
 )
 
 // returns a container configuration.
@@ -46,6 +47,13 @@ func toConfig(pipelineConfig *spec.PipelineConfig, step *spec.Step) *container.C
 	if len(step.Volumes) != 0 {
 		config.Volumes = toVolumeSet(pipelineConfig, step)
 	}
+	if len(step.PortBindings) != 0 {
+		exposedPorts := make(nat.PortSet)
+		for _, ctrPort := range step.PortBindings {
+			exposedPorts[nat.Port(ctrPort)] = struct{}{}
+		}
+		config.ExposedPorts = exposedPorts
+	}
 	return config
 }
 
@@ -91,6 +99,23 @@ func toHostConfig(pipelineConfig *spec.PipelineConfig, step *spec.Step) *contain
 		config.Binds = toVolumeSlice(pipelineConfig, step)
 		config.Mounts = toVolumeMounts(pipelineConfig, step)
 	}
+
+	if len(step.PortBindings) != 0 {
+		portBinding := make(nat.PortMap)
+		for hostPort, ctrPort := range step.PortBindings {
+			p := nat.Port(ctrPort)
+			if _, ok := portBinding[p]; ok {
+				portBinding[p] = append(portBinding[p], nat.PortBinding{HostPort: hostPort})
+			} else {
+				portBinding[p] = []nat.PortBinding{
+					{
+						HostPort: hostPort,
+					},
+				}
+			}
+		}
+		config.PortBindings = portBinding
+	}
 	return config
 }
 
diff --git a/engine/spec/spec.go b/engine/spec/spec.go
index ad57fa57..22abdd6f 100644
--- a/engine/spec/spec.go
+++ b/engine/spec/spec.go
@@ -41,6 +41,7 @@ type (
 		Name         string            `json:"name,omitempty"`
 		Network      string            `json:"network,omitempty"`
 		Networks     []string          `json:"networks,omitempty"`
+		PortBindings map[string]string `json:"port_bindings,omitempty"` // Host port to container port mapping.
 		Privileged   bool              `json:"privileged,omitempty"`
 		Pull         PullPolicy        `json:"pull,omitempty"`
 		Secrets      []*Secret         `json:"secrets,omitempty"`
diff --git a/pipeline/runtime/convert.go b/pipeline/runtime/convert.go
index 8e3e6a88..ffb26ddb 100644
--- a/pipeline/runtime/convert.go
+++ b/pipeline/runtime/convert.go
@@ -29,6 +29,7 @@ func toStep(r *api.StartStepRequest) *spec.Step {
 		Name:         r.Name,
 		Network:      r.Network,
 		Networks:     r.Networks,
+		PortBindings: r.PortBindings,
 		Privileged:   r.Privileged,
 		Pull:         r.Pull,
 		ShmSize:      r.ShmSize,