diff --git a/cmd/flags/flags.go b/cmd/flags/flags.go
new file mode 100644
index 0000000..2a627fb
--- /dev/null
+++ b/cmd/flags/flags.go
@@ -0,0 +1,7 @@
+package flags
+
+const (
+	LON  = "lon"
+	LAT  = "lat"
+	JSON = "json"
+)
diff --git a/cmd/now.go b/cmd/now.go
index ccab052..bf53fc0 100644
--- a/cmd/now.go
+++ b/cmd/now.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 
+	"git.sr.ht/~timharek/yr-go/cmd/flags"
 	"git.sr.ht/~timharek/yr-go/internal/nominatim"
 	"git.sr.ht/~timharek/yr-go/yr"
 	"github.com/spf13/cobra"
@@ -23,10 +24,10 @@ func init() {
 }
 
 func now(cmd *cobra.Command, args []string) {
-	isJson, err := cmd.Flags().GetBool("json")
+	isJson, err := cmd.Flags().GetBool(flags.JSON)
 	cobra.CheckErr(err)
-	lon, _ := cmd.Flags().GetFloat64("lon")
-	lat, _ := cmd.Flags().GetFloat64("lat")
+	lon, _ := cmd.Flags().GetFloat64(flags.LON)
+	lat, _ := cmd.Flags().GetFloat64(flags.LAT)
 
 	c, err := yr.New()
 	cobra.CheckErr(err)
diff --git a/cmd/root.go b/cmd/root.go
index 06fc9bd..387bd48 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -3,6 +3,7 @@ package cmd
 import (
 	"os"
 
+	"git.sr.ht/~timharek/yr-go/cmd/flags"
 	"github.com/spf13/cobra"
 )
 
@@ -20,7 +21,7 @@ func Execute() {
 }
 
 func init() {
-	rootCmd.PersistentFlags().Bool("json", false, "Result in JSON")
-	rootCmd.PersistentFlags().Float64P("lon", "x", 0, "Longitude coordinate")
-	rootCmd.PersistentFlags().Float64P("lat", "y", 0, "Latitude coordinate")
+	rootCmd.PersistentFlags().Bool(flags.JSON, false, "Result in JSON")
+	rootCmd.PersistentFlags().Float64P(flags.LON, "x", 0, "Longitude coordinate")
+	rootCmd.PersistentFlags().Float64P(flags.LAT, "y", 0, "Latitude coordinate")
 }