diff --git a/packages/js-sdk/src/api/index.ts b/packages/js-sdk/src/api/index.ts
index 4452bd8319..abacdb99ef 100644
--- a/packages/js-sdk/src/api/index.ts
+++ b/packages/js-sdk/src/api/index.ts
@@ -52,13 +52,13 @@ class ApiClient {
 
     this.api = createClient<paths>({
       baseUrl: config.apiUrl,
-      // keepalive: true, // TODO: Return keepalive
       headers: {
         ...defaultHeaders,
         ...(config.apiKey && { 'X-API-KEY': config.apiKey }),
         ...(config.accessToken && {
           Authorization: `Bearer ${config.accessToken}`,
         }),
+        ...{ Connection: 'keep-alive' },
         ...config.headers,
       },
     })
diff --git a/packages/js-sdk/src/sandbox/index.ts b/packages/js-sdk/src/sandbox/index.ts
index 3bad2634d4..c3ae254833 100644
--- a/packages/js-sdk/src/sandbox/index.ts
+++ b/packages/js-sdk/src/sandbox/index.ts
@@ -168,6 +168,7 @@ export class Sandbox extends SandboxApi {
           ...(options ?? {}),
           headers: headers,
           redirect: 'follow',
+          keepalive: true,
         }
 
         return fetch(url, options)
@@ -180,8 +181,8 @@ export class Sandbox extends SandboxApi {
         logger: opts?.logger,
         accessToken: this.envdAccessToken,
         headers: this.envdAccessToken
-          ? { 'X-Access-Token': this.envdAccessToken }
-          : {},
+          ? { 'X-Access-Token': this.envdAccessToken, Connection: 'keep-alive' }
+          : { Connection: 'keep-alive' },
       },
       {
         version: opts?.envdVersion,
diff --git a/packages/python-sdk/e2b/api/client/client.py b/packages/python-sdk/e2b/api/client/client.py
index eeffd00c86..f7bd11fc49 100644
--- a/packages/python-sdk/e2b/api/client/client.py
+++ b/packages/python-sdk/e2b/api/client/client.py
@@ -232,7 +232,7 @@ def get_httpx_client(self) -> httpx.Client:
             self._client = httpx.Client(
                 base_url=self._base_url,
                 cookies=self._cookies,
-                headers=self._headers,
+                headers={**self._headers, "Connection": "keep-alive"},
                 timeout=self._timeout,
                 verify=self._verify_ssl,
                 follow_redirects=self._follow_redirects,
diff --git a/packages/python-sdk/e2b_connect/client.py b/packages/python-sdk/e2b_connect/client.py
index ab52a3baa7..6a5e57f002 100644
--- a/packages/python-sdk/e2b_connect/client.py
+++ b/packages/python-sdk/e2b_connect/client.py
@@ -161,7 +161,10 @@ def __init__(
         self._codec = JSONCodec if json else ProtobufCodec
         self._response_type = response_type
         self._compressor = compressor
-        self._headers = {**{"user-agent": "connect-python"}, **headers}
+        self._headers = {
+            **{"user-agent": "connect-python", "Connection": "keep-alive"},
+            **headers,
+        }
         self._connection_retries = 3
 
     def _prepare_unary_request(