diff --git a/README.md b/README.md
index 4ae9aee..5371954 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ portainer-cli create_stack -n stack_name -e 1 stack-test -f docker-compose.yml
 | `-n` or `-stack-name` | Stack name |
 | `-e` or `-endpoint-id` | Endpoint id (required) |
 | `-f` or `-stack-file` |Stack file |
-| `-ef` or `-env-file` | Pass env file path, usually `.env` |
+| `-w` or `-env-file` | Pass env file path, usually `.env` |
 
 ### update_stack command
 
@@ -99,7 +99,7 @@ Where `var` is the environment variable name and `value` is the environment vari
 | `-s` or `-stack-id` | Stack id |
 | `-e` or `-endpoint-id` | Endpoint id (required) |
 | `-f` or `-stack-file` |Stack file |
-| `-ef` or `-env-file` | Pass env file path, usually `.env` |
+| `-w` or `-env-file` | Pass env file path, usually `.env` |
 | `-p` or `--prune` | Prune services |
 | `-c` or `--clear-env` | Clear all environment variables |
 
@@ -108,7 +108,7 @@ Where `var` is the environment variable name and `value` is the environment vari
 Create or update a stack based on it's name.
 
 ```bash
-portainer-cli create_or_update_stack -n stack_name -e endpoint_id -f stack_file [`-ef` or `-env-file`]
+portainer-cli create_or_update_stack -n stack_name -e endpoint_id -f stack_file
 ```
 
 **E.g:**
@@ -120,7 +120,7 @@ portainer-cli update_stack -s 18 -e 1 -f docker-compose.yml
 #### Environment variables arguments
 
 ```bash
-portainer-cli create_or_update_stack -n stack_name -e endpoint_id -f stack_file [`-ef` or `-env-file`]--env.var=value
+portainer-cli create_or_update_stack -n stack_name -e endpoint_id -f stack_file --env.var=value
 ```
 
 Where `var` is the environment variable name and `value` is the environment variable value.
@@ -132,7 +132,7 @@ Where `var` is the environment variable name and `value` is the environment vari
 | `-n` or `-stack-name` | Stack name |
 | `-e` or `-endpoint-id` | Endpoint id (required) |
 | `-f` or `-stack-file` |Stack file |
-| `-ef` or `-env-file` | Pass env file path, usually `.env` |
+| `-w` or `-env-file` | Pass env file path, usually `.env` |
 | `-p` or `--prune` | Prune services |
 | `-c` or `--clear-env` | Clear all environment variables |
 
diff --git a/portainer_cli/__init__.py b/portainer_cli/__init__.py
index bfb224c..cb04902 100755
--- a/portainer_cli/__init__.py
+++ b/portainer_cli/__init__.py
@@ -274,7 +274,7 @@ class PortainerCLI(object):
             stack_name=('Stack name', 'option', 'n', str),
             endpoint_id=('Endpoint id', 'option', 'e', int),
             stack_file=('Stack file', 'option', 'f'),
-            env_file=('Environment Variable file', 'option', 'ef'),
+            env_file=('Environment Variable file', 'option', 'w'),
             prune=('Prune services', 'flag', 'p'),
             clear_env=('Clear all env vars', 'flag', 'c'),
         )
@@ -290,7 +290,7 @@ class PortainerCLI(object):
         stack_name=('Stack name', 'option', 'n'),
         endpoint_id=('Endpoint id', 'option', 'e', int),
         stack_file=('Environment Variable file', 'option', 'f')
-        env_file=('Environment Variable file', 'option', 'ef')
+        env_file=('Environment Variable file', 'option', 'w')
     )
     def create_stack(self, stack_name, endpoint_id, stack_file, env_file='', *args):
         logger.info('Creating stack name={}'.format(stack_name))
@@ -393,7 +393,7 @@ class PortainerCLI(object):
         stack_id=('Stack id', 'option', 's', int),
         endpoint_id=('Endpoint id', 'option', 'e', int),
         stack_file=('Stack file', 'option', 'f'),
-        env_file=('Environment Variable file', 'option', 'ef'),
+        env_file=('Environment Variable file', 'option', 'w'),
         prune=('Prune services', 'flag', 'p'),
         clear_env=('Clear all env vars', 'flag', 'c'),
     )