diff --git a/config.go b/config.go
index c7da319..cee1a10 100644
--- a/config.go
+++ b/config.go
@@ -2,9 +2,12 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"os/exec"
+	"os/user"
 	"path"
+	"path/filepath"
 	"strings"
 
 	"gopkg.in/yaml.v2"
@@ -67,6 +70,19 @@ func EditConfig(path string) error {
 func setTmuxOptions(tmuxOpts *TmuxOptions, c Config) {
 	tmuxOpts.SocketName = c.SocketName
 	tmuxOpts.SocketPath = c.SocketPath
+
+	if c.ConfigFile != "" {
+		usr, err := user.Current()
+		if err != nil {
+			log.Fatalf("cannot expand user home dir: %s",  err)
+		}
+		path := c.ConfigFile
+		if strings.HasPrefix(path,"~") {
+			path = filepath.Join(usr.HomeDir, path[1:])
+		}
+
+		tmuxOpts.ConfigFile = path
+	}
 }
 
 func GetConfig(path string, settings map[string]string, tmuxOpts *TmuxOptions) (*Config, error) {
diff --git a/config_test.go b/config_test.go
index b9da74d..3083dd9 100644
--- a/config_test.go
+++ b/config_test.go
@@ -12,7 +12,8 @@ session: ${session}
 sendkeys_timeout: 200
 tmux_options:
     socket_name: foo
-    socket_path: /foo/bar
+    socket_path: /path/to/socket
+    config_file: /path/to/tmux_config
 windows:
   - layout: tiled
     commands:
@@ -36,7 +37,8 @@ windows:
 		Env:             make(map[string]string),
 		TmuxOptions: TmuxOptions{
 			SocketName: "foo",
-			SocketPath: "/foo/bar",
+			SocketPath: "/path/to/socket",
+			ConfigFile: "/path/to/tmux_config",
 		},
 		Windows: []Window{
 			{
diff --git a/tmux.go b/tmux.go
index a910ea7..bb7b7e0 100644
--- a/tmux.go
+++ b/tmux.go
@@ -23,6 +23,9 @@ type TmuxOptions struct {
 
 	// Default socket path, overrides SocketName
 	SocketPath string `yaml:"socket_path"`
+
+	// tmux config file
+	ConfigFile string `yaml:"config_file"`
 }
 
 type Tmux struct {
@@ -48,6 +51,11 @@ func (tmux Tmux) cmd(args ...string) *exec.Cmd {
 	} else if tmux.SocketName != "" {
 		tmuxCmd = append(tmuxCmd, "-L", tmux.SocketName)
 	} 
+
+	if tmux.ConfigFile != "" {
+		tmuxCmd = append(tmuxCmd, "-f", tmux.ConfigFile)
+	}
+
 	tmuxCmd = append(tmuxCmd, args...)
 
 	return exec.Command(tmuxCmd[0], tmuxCmd[1:]...)