diff --git a/server/src/main/java/com/exacaster/lighter/backend/SparkApp.java b/server/src/main/java/com/exacaster/lighter/backend/SparkApp.java
index 2e93c77a..03d38278 100644
--- a/server/src/main/java/com/exacaster/lighter/backend/SparkApp.java
+++ b/server/src/main/java/com/exacaster/lighter/backend/SparkApp.java
@@ -1,41 +1,46 @@
 package com.exacaster.lighter.backend;
 
-import static org.apache.spark.launcher.SparkLauncher.DRIVER_MEMORY;
-import static org.apache.spark.launcher.SparkLauncher.EXECUTOR_CORES;
-import static org.apache.spark.launcher.SparkLauncher.EXECUTOR_MEMORY;
-
 import com.exacaster.lighter.application.Application;
 import com.exacaster.lighter.concurrency.EmptyWaitable;
 import com.exacaster.lighter.concurrency.Waitable;
+import org.apache.spark.launcher.SparkLauncher;
+
 import java.io.IOException;
+import java.util.Collections;
 import java.util.Map;
 import java.util.function.Consumer;
-import org.apache.spark.launcher.SparkLauncher;
+
+import static org.apache.spark.launcher.SparkLauncher.DRIVER_MEMORY;
+import static org.apache.spark.launcher.SparkLauncher.EXECUTOR_CORES;
+import static org.apache.spark.launcher.SparkLauncher.EXECUTOR_MEMORY;
 
 public class SparkApp {
 
     private final Map<String, String> configDefaults;
     private final Map<String, String> backendConfiguration;
+    private final Map<String, String> envVariables;
     private final Application application;
     private final SparkListener listener;
 
     public SparkApp(Application application,
             Map<String, String> configDefaults,
             Map<String, String> backendConfiguration,
-            SparkListener listener) {
+            Consumer<Throwable> errorHandler) {
+        this(application, configDefaults, backendConfiguration, Collections.emptyMap(), new ClusterSparkListener(errorHandler));
+    }
+
+    public SparkApp(Application application,
+                    Map<String, String> configDefaults,
+                    Map<String, String> backendConfiguration,
+                    Map<String, String> envVariables,
+                    SparkListener listener) {
         this.application = application;
         this.configDefaults = configDefaults;
         this.backendConfiguration = backendConfiguration;
+        this.envVariables = envVariables;
         this.listener = listener;
     }
 
-    public SparkApp(Application application,
-            Map<String, String> configDefaults,
-            Map<String, String> backendConfiguration,
-            Consumer<Throwable> errorHandler) {
-        this(application, configDefaults, backendConfiguration, new ClusterSparkListener(errorHandler));
-    }
-
     public Waitable launch() {
         try {
             var launcher = buildLauncher();
@@ -50,7 +55,7 @@ public Waitable launch() {
 
     private SparkLauncher buildLauncher() {
         var submitParams = application.getSubmitParams();
-        var launcher = new SparkLauncher()
+        var launcher = new SparkLauncher(envVariables)
                 .setAppName(submitParams.getName())
                 .setAppResource(submitParams.getFile());
 
diff --git a/server/src/main/java/com/exacaster/lighter/backend/local/LocalBackend.java b/server/src/main/java/com/exacaster/lighter/backend/local/LocalBackend.java
index f5fbad39..5c3f01ad 100644
--- a/server/src/main/java/com/exacaster/lighter/backend/local/LocalBackend.java
+++ b/server/src/main/java/com/exacaster/lighter/backend/local/LocalBackend.java
@@ -1,10 +1,5 @@
 package com.exacaster.lighter.backend.local;
 
-import static com.exacaster.lighter.backend.Constants.DEPLOY_MODE_CLIENT;
-import static org.apache.spark.launcher.SparkLauncher.CHILD_PROCESS_LOGGER_NAME;
-import static org.apache.spark.launcher.SparkLauncher.DEPLOY_MODE;
-import static org.apache.spark.launcher.SparkLauncher.SPARK_MASTER;
-
 import com.exacaster.lighter.application.Application;
 import com.exacaster.lighter.application.ApplicationInfo;
 import com.exacaster.lighter.backend.Backend;
@@ -13,11 +8,17 @@
 import com.exacaster.lighter.log.Log;
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
+
 import java.time.Duration;
 import java.util.Map;
 import java.util.Optional;
 import java.util.function.Consumer;
 
+import static com.exacaster.lighter.backend.Constants.DEPLOY_MODE_CLIENT;
+import static org.apache.spark.launcher.SparkLauncher.CHILD_PROCESS_LOGGER_NAME;
+import static org.apache.spark.launcher.SparkLauncher.DEPLOY_MODE;
+import static org.apache.spark.launcher.SparkLauncher.SPARK_MASTER;
+
 public class LocalBackend implements Backend {
 
     private final AppConfiguration conf;
@@ -69,6 +70,10 @@ public SparkApp prepareSparkApplication(Application application, Map<String, Str
                         SPARK_MASTER, "local[*]",
                         CHILD_PROCESS_LOGGER_NAME, localApp.getLoggerName()
                 ),
+                Map.of("LIGHTER_SESSION_ID", application.getId(),
+                        "PY_GATEWAY_PORT", conf.getPyGatewayPort().toString(),
+                        "PY_GATEWAY_HOST", "localhost"
+                ),
                 localApp
         );
     }