diff --git a/cmd/flags.go b/cmd/flags.go
index ee7f95ffeb..4cece39117 100644
--- a/cmd/flags.go
+++ b/cmd/flags.go
@@ -77,12 +77,10 @@ func initGlobalConfigFlags(cmd *cobra.Command, configFilePath *string) {
 // start command to run the client against test networks. Only one flag
 // from this set is allowed.
 func initGlobalNetworkFlags(cmd *cobra.Command) {
-	// TODO: Remove the mainnet flag.
-	// DEPRECATED
 	cmd.PersistentFlags().Bool(
 		network.Mainnet.String(),
 		false,
-		"Mainnet network (DEPRECATED)",
+		"Mainnet network",
 	)
 
 	cmd.PersistentFlags().Bool(
diff --git a/config/config.go b/config/config.go
index 910e5c48ee..cc008478ef 100644
--- a/config/config.go
+++ b/config/config.go
@@ -119,15 +119,6 @@ func (c *Config) ReadConfig(configFilePath string, flagSet *pflag.FlagSet, categ
 		if err != nil {
 			return fmt.Errorf("unable to resolve networks: [%w]", err)
 		}
-
-		// TODO: Remove the mainnet flag.
-		// DEPRECATED
-		if isMainnet, err := flagSet.GetBool(network.Mainnet.String()); err == nil && isMainnet {
-			logger.Warnf(
-				"--%s flag is deprecated, to run the client against the mainnet don't provide any network flag",
-				network.Mainnet.String(),
-			)
-		}
 	}
 
 	// Read configuration from a file if the config file path is set.
diff --git a/docs/resources/client-start-help b/docs/resources/client-start-help
index f0e5338d60..09bc3386aa 100644
--- a/docs/resources/client-start-help
+++ b/docs/resources/client-start-help
@@ -44,7 +44,7 @@ Flags:
 Global Flags:
   -c, --config string   Path to the configuration file. Supported formats: TOML, YAML, JSON.
       --developer       Developer network
-      --mainnet         Mainnet network (DEPRECATED)
+      --mainnet         Mainnet network
       --testnet         Testnet network
 
 Environment variables: