diff --git a/helm/chart/templates/job.yaml b/helm/chart/templates/job.yaml
index 6a69c5b4..9ab6851e 100644
--- a/helm/chart/templates/job.yaml
+++ b/helm/chart/templates/job.yaml
@@ -4,7 +4,7 @@ metadata:
   name: {{ include "streamflow.fullname" . }}
   labels:
     {{- include "streamflow.labels" . | nindent 4 }}
-  annottions:
+  annotations:
     "helm.sh/hook": post-install
     "helm.sh/hook-delete-policy": hook-succeeded
 spec:
diff --git a/streamflow/config/schemas/v1.0/helm2.json b/streamflow/config/schemas/v1.0/helm2.json
index 569892e4..61b64b6e 100644
--- a/streamflow/config/schemas/v1.0/helm2.json
+++ b/streamflow/config/schemas/v1.0/helm2.json
@@ -80,6 +80,11 @@
       "type": "string",
       "description": "Absolute path of the kubeconfig file to be used"
     },
+    "maxConcurrentConnections": {
+      "type": "integer",
+      "description": "Maximum number of concurrent connections to open for a single Kubernetes client",
+      "default": 10
+    },
     "namespace": {
       "type": "string",
       "description": "Namespace to install the release into",
diff --git a/streamflow/deployment/connector/helm.py b/streamflow/deployment/connector/helm.py
index bb0e49b9..c590ad73 100644
--- a/streamflow/deployment/connector/helm.py
+++ b/streamflow/deployment/connector/helm.py
@@ -9,9 +9,9 @@
 import tarfile
 import tempfile
 import uuid
-import zlib
 from abc import ABC
 from typing import MutableMapping, MutableSequence, Optional, Any, Tuple, Union
+from urllib.parse import urlencode
 
 import yaml
 from cachetools import Cache, TTLCache
@@ -44,6 +44,53 @@ def _set_config(self, configuration: Optional[Configuration] = None):
         configuration.api_key['authorization'] = "bearer " + self.token
 
 
+class PatchedWsApiClient(WsApiClient):
+
+    async def request(self, method, url, query_params=None, headers=None,
+                      post_params=None, body=None, _preload_content=True,
+                      _request_timeout=None):
+        if query_params:
+            new_query_params = []
+            for key, value in query_params:
+                if key == 'command' and isinstance(value, list):
+                    for command in value:
+                        new_query_params.append((key, command))
+                else:
+                    new_query_params.append((key, value))
+            query_params = new_query_params
+        if headers is None:
+            headers = {}
+        if 'sec-websocket-protocol' not in headers:
+            headers['sec-websocket-protocol'] = 'v4.channel.k8s.io'
+
+        if query_params:
+            url += '?' + urlencode(query_params)
+
+        url = ws_client.get_websocket_url(url)
+
+        if _preload_content:
+
+            resp_all = ''
+            async with self.rest_client.pool_manager.ws_connect(
+                    url,
+                    headers=headers,
+                    heartbeat=30) as ws:
+                async for msg in ws:
+                    msg = msg.data.decode('utf-8')
+                    if len(msg) > 1:
+                        channel = ord(msg[0])
+                        data = msg[1:]
+                        if data:
+                            if channel in [ws_client.STDOUT_CHANNEL, ws_client.STDERR_CHANNEL]:
+                                resp_all += data
+
+            return ws_client.WsResponse(resp_all.encode('utf-8'))
+
+        else:
+
+            return await self.rest_client.pool_manager.ws_connect(url, headers=headers, heartbeat=30)
+
+
 class BaseHelmConnector(BaseConnector, ABC):
 
     def __init__(self,
@@ -53,7 +100,8 @@ def __init__(self,
                  namespace: Optional[Text] = None,
                  releaseName: Optional[Text] = "release-%s" % str(uuid.uuid1()),
                  resourcesCacheTTL: int = 10,
-                 transferBufferSize: int = (2 ** 25) - 1):
+                 transferBufferSize: int = (2 ** 25) - 1,
+                 maxConcurrentConnections: int = 4096):
         super().__init__(
             streamflow_config_dir=streamflow_config_dir,
             transferBufferSize=transferBufferSize)
@@ -65,6 +113,7 @@ def __init__(self,
         self.configuration: Optional[Configuration] = None
         self.client: Optional[client.CoreV1Api] = None
         self.client_ws: Optional[client.CoreV1Api] = None
+        self.maxConcurrentConnections: int = maxConcurrentConnections
 
     def _configure_incluster_namespace(self):
         if self.namespace is None:
@@ -209,10 +258,12 @@ async def _get_effective_resources(self,
     async def deploy(self, external: bool):
         # Init standard client
         configuration = await self._get_configuration()
+        configuration.connection_pool_maxsize = self.maxConcurrentConnections
         self.client = client.CoreV1Api(api_client=ApiClient(configuration=configuration))
         # Init WebSocket client
         configuration = await self._get_configuration()
-        ws_api_client = WsApiClient(configuration=configuration)
+        configuration.connection_pool_maxsize = self.maxConcurrentConnections
+        ws_api_client = PatchedWsApiClient(configuration=configuration)
         ws_api_client.set_default_header('Connection', 'upgrade,keep-alive')
         self.client_ws = client.CoreV1Api(api_client=ws_api_client)
 
diff --git a/streamflow/version.py b/streamflow/version.py
index 896872d4..2e461129 100644
--- a/streamflow/version.py
+++ b/streamflow/version.py
@@ -1 +1 @@
-VERSION = "0.0.29"
+VERSION = "0.0.30"