diff --git a/internal/config/environment.go b/internal/config/environment.go
index 1683ad57..cedb653f 100644
--- a/internal/config/environment.go
+++ b/internal/config/environment.go
@@ -1,6 +1,7 @@
 package config
 
 import (
+	"flag"
 	"fmt"
 	"os"
 	"path"
@@ -15,10 +16,18 @@ var (
 	EnvVarBinPath     = "BACKREST_RESTIC_COMMAND" // path to restic binary (default restic)
 )
 
+var flagDataDir = flag.String("data-dir", "", "path to data directory, defaults to XDG_DATA_HOME/.local/backrest. Overrides BACKREST_DATA environment variable.")
+var flagConfigPath = flag.String("config-file", "", "path to config file, defaults to XDG_CONFIG_HOME/backrest/config.json. Overrides BACKREST_CONFIG environment variable.")
+var flagBindAddress = flag.String("bind-address", "", "address to bind to, defaults to :9898. Use 127.0.0.1:9898 to listen only on localhost. Overrides BACKREST_PORT environment variable.")
+var flagResticBinPath = flag.String("restic-cmd", "", "path to restic binary, defaults to a backrest managed version of restic. Overrides BACKREST_RESTIC_COMMAND environment variable.")
+
 // ConfigFilePath
 // - *nix systems use $XDG_CONFIG_HOME/backrest/config.json
 // - windows uses %APPDATA%/backrest/config.json
 func ConfigFilePath() string {
+	if *flagConfigPath != "" {
+		return *flagConfigPath
+	}
 	if val := os.Getenv(EnvVarConfigPath); val != "" {
 		return val
 	}
@@ -29,6 +38,9 @@ func ConfigFilePath() string {
 // - *nix systems use $XDG_DATA_HOME/backrest
 // - windows uses %APPDATA%/backrest/data
 func DataDir() string {
+	if *flagDataDir != "" {
+		return *flagDataDir
+	}
 	if val := os.Getenv(EnvVarDataDir); val != "" {
 		return val
 	}
@@ -43,16 +55,19 @@ func DataDir() string {
 }
 
 func BindAddress() string {
+	if *flagBindAddress != "" {
+		return formatBindAddress(*flagBindAddress)
+	}
 	if val := os.Getenv(EnvVarBindAddress); val != "" {
-		if !strings.Contains(val, ":") {
-			return ":" + val
-		}
-		return val
+		return formatBindAddress(val)
 	}
 	return ":9898"
 }
 
 func ResticBinPath() string {
+	if *flagResticBinPath != "" {
+		return *flagResticBinPath
+	}
 	if val := os.Getenv(EnvVarBinPath); val != "" {
 		return val
 	}
@@ -80,3 +95,10 @@ func getConfigDir() string {
 	}
 	return path.Join(getHomeDir(), ".config")
 }
+
+func formatBindAddress(addr string) string {
+	if !strings.Contains(addr, ":") {
+		return ":" + addr
+	}
+	return addr
+}