diff --git a/README.md b/README.md
index 38c07c2..ecfb76a 100644
--- a/README.md
+++ b/README.md
@@ -187,6 +187,9 @@ $ alpacon websh -u [USER NAME] -g [GROUP NAME] [SERVER NAME] [COMMAND]
 $ alpacon websh --username=[USER NAME] --groupname=[GROUP NAME] [SERVER NAME] [COMMAND]
 
 $ alpacon websh --env="KEY1=VALUE1" --env="KEY2=VALUE2" [SERVER NAME] [COMMAND]
+
+# Use the current shell's value for the environment variable 'KEY'.
+$ alpacon websh --env="KEY" [SERVER NAME] [COMMAND]
 ```
 - Note: All flags must be placed before the `[SERVER NAME]`.
 
diff --git a/cmd/websh/websh.go b/cmd/websh/websh.go
index 85f3c05..3203a27 100644
--- a/cmd/websh/websh.go
+++ b/cmd/websh/websh.go
@@ -7,6 +7,7 @@ import (
 	"github.com/alpacanetworks/alpacon-cli/client"
 	"github.com/alpacanetworks/alpacon-cli/utils"
 	"github.com/spf13/cobra"
+	"os"
 	"strings"
 )
 
@@ -23,6 +24,12 @@ var WebshCmd = &cobra.Command{
 
 	// Execute a command directly on a server and retrieve the output
 	alpacon websh [SERVER_NAME] [COMMAND]
+	
+	// Set the environment variable 'KEY' to 'VALUE' for the command.
+	alpacon websh --env="KEY1=VALUE1" --env="KEY2=VALUE2" [SERVER NAME] [COMMAND]
+
+	// Use the current shell's value for the environment variable 'KEY'.
+	alpacon websh --env="KEY" [SERVER NAME] [COMMAND]
 
 	// Open a websh terminal as a root user
 	alpacon websh -r [SERVER_NAME]
@@ -45,6 +52,8 @@ var WebshCmd = &cobra.Command{
 	-r          					   Run the websh terminal as the root user.
 	-u / --username [USER_NAME]        Specify the username under which the command should be executed.
 	-g / --groupname [GROUP_NAME]      Specify the group name under which the command should be executed.
+	--env="KEY=VALUE"                  Set the environment variable 'KEY' to 'VALUE' for the command.
+	--env="KEY"                        Use the current shell's value for the environment variable 'KEY'.	
 	
 	-s, --share                        Share the current terminal to others via a temporary link.
 	--url [SHARED_URL]                 Specify the URL of the shared session to join.
@@ -157,6 +166,13 @@ func extractEnvValue(args []string, i int, env map[string]string) int {
 	parts := strings.SplitN(envString, "=", 2)
 	if len(parts) == 2 {
 		env[parts[0]] = parts[1]
+	} else if len(parts) == 1 {
+		value, exists := os.LookupEnv(parts[0])
+		if !exists {
+			utils.CliWarning("No environment variable found for key '%s'\n", parts[0])
+		} else {
+			env[parts[0]] = value
+		}
 	} else {
 		utils.CliError("Invalid format for --env. Expected '--env=KEY=VALUE'.")
 	}
diff --git a/cmd/websh/websh_test.go b/cmd/websh/websh_test.go
index 4514e55..5f14810 100644
--- a/cmd/websh/websh_test.go
+++ b/cmd/websh/websh_test.go
@@ -236,6 +236,15 @@ func TestCommandParsing(t *testing.T) {
 			expectServerName:  "server-name",
 			expectCommandArgs: []string{"cmd"},
 		},
+		{
+			testName:          "EnvKeyWithoutValue",
+			args:              []string{"--env=KEY", "server-name", "cmd"},
+			expectUsername:    "",
+			expectGroupname:   "",
+			expectEnv:         map[string]string{}, // Assume no environment variable exists for 'KEY'
+			expectServerName:  "server-name",
+			expectCommandArgs: []string{"cmd"},
+		},
 	}
 
 	for _, tc := range tests {