diff --git a/Dockerfile b/Dockerfile
index 7e59b667..1c2e42f1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -41,6 +41,8 @@ RUN apk --update --no-cache add \
 COPY --from=builder /app/diun /usr/local/bin/diun
 COPY --from=builder /app/zoneinfo.zip /usr/local/go/lib/time/zoneinfo.zip
 
+ENV DIUN_DB="/data/diun.db"
+
 VOLUME [ "/data" ]
 
-CMD [ "diun", "--config", "/diun.yml", "--docker" ]
+CMD [ "diun", "--config", "/diun.yml" ]
diff --git a/cmd/main.go b/cmd/main.go
index 743d6d10..4ab77dad 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -30,7 +30,6 @@ func main() {
 	kingpin.Flag("log-level", "Set log level.").Envar("LOG_LEVEL").Default("info").StringVar(&flags.LogLevel)
 	kingpin.Flag("log-json", "Enable JSON logging output.").Envar("LOG_JSON").Default("false").BoolVar(&flags.LogJson)
 	kingpin.Flag("log-caller", "Enable to add file:line of the caller.").Envar("LOG_CALLER").Default("false").BoolVar(&flags.LogCaller)
-	kingpin.Flag("docker", "Enable Docker mode.").Envar("DOCKER").Default("false").BoolVar(&flags.Docker)
 	kingpin.UsageTemplate(kingpin.CompactUsageTemplate).Version(version).Author("CrazyMax")
 	kingpin.CommandLine.Name = "diun"
 	kingpin.CommandLine.Help = `Docker image update notifier. More info on https://github.com/crazy-max/diun`
diff --git a/internal/config/config.go b/internal/config/config.go
index 5f950189..9ca9690e 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -85,10 +85,6 @@ func Load(flags model.Flags, version string) (*Config, error) {
 }
 
 func (cfg *Config) validate() error {
-	if cfg.Flags.Docker {
-		cfg.Db.Path = "/data/diun.db"
-	}
-
 	cfg.Db.Path = utl.GetEnv("DIUN_DB", cfg.Db.Path)
 	if cfg.Db.Path == "" {
 		return errors.New("database path is required")
diff --git a/internal/model/flags.go b/internal/model/flags.go
index 8b52fa88..d4b636e8 100644
--- a/internal/model/flags.go
+++ b/internal/model/flags.go
@@ -7,5 +7,4 @@ type Flags struct {
 	LogLevel  string
 	LogJson   bool
 	LogCaller bool
-	Docker    bool
 }