diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7569dafe4..3524599d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## X.X.X
+* Added a new config flag `setUseSerialExecutor(boolean useSerial)` for selecting immediate request executor type.
+* Immediate requests now will be run by parallel executor instead of serial by default.
+
 ## 25.4.4
 * Improved disk size calculation in crash reports.
   
diff --git a/sdk/src/main/java/ly/count/android/sdk/Countly.java b/sdk/src/main/java/ly/count/android/sdk/Countly.java
index fbcb9b64b..26f7e8eea 100644
--- a/sdk/src/main/java/ly/count/android/sdk/Countly.java
+++ b/sdk/src/main/java/ly/count/android/sdk/Countly.java
@@ -202,6 +202,9 @@ private static class SingletonHolder {
 
     protected CountlyConfig config_ = null;
 
+    // for executor choice of immediate requests
+    boolean useSerialExecutorInternal = false;
+
     //fields for tracking push token debounce
     final static long lastRegistrationCallDebounceDuration = 60 * 1000;//60seconds
     long lastRegistrationCallTs = 0;
@@ -369,6 +372,9 @@ public synchronized Countly init(CountlyConfig config) {
                 config.sdkInternalLimits.maxKeyLength = maxKeyLengthDefault;
             }
 
+            // should be here for sbs and hc
+            useSerialExecutorInternal = config.useSerialExecutor;
+
             if (config.sdkInternalLimits.maxValueSize != null) {
                 if (config.sdkInternalLimits.maxValueSize < 1) {
                     config.sdkInternalLimits.maxValueSize = 1;
diff --git a/sdk/src/main/java/ly/count/android/sdk/CountlyConfig.java b/sdk/src/main/java/ly/count/android/sdk/CountlyConfig.java
index a0a87a0ce..94257685a 100644
--- a/sdk/src/main/java/ly/count/android/sdk/CountlyConfig.java
+++ b/sdk/src/main/java/ly/count/android/sdk/CountlyConfig.java
@@ -206,6 +206,9 @@ public class CountlyConfig {
     boolean sdkBehaviorSettingsRequestsDisabled = false;
     int requestTimeoutDuration = 30; // in seconds
 
+    // If set to true, immediate requests will use serial AsyncTask executor instead of the thread pool
+    boolean useSerialExecutor = false;
+
     /**
      * THIS VARIABLE SHOULD NOT BE USED
      * IT IS ONLY FOR INTERNAL TESTING
@@ -1052,6 +1055,19 @@ public synchronized CountlyConfig setRequestTimeoutDuration(int requestTimeoutDu
         return this;
     }
 
+    /**
+     * To select the legacy AsyncTask.execute (serial executor) or
+     * instead executeOnExecutor(THREAD_POOL_EXECUTOR)
+     * Default is false and the SDK will use the thread pool executor.
+     *
+     * @param useSerial set to true to use serial executor
+     * @return Returns the same config object for convenient linking
+     */
+    public synchronized CountlyConfig setUseSerialExecutor(boolean useSerial) {
+        this.useSerialExecutor = useSerial;
+        return this;
+    }
+
     /**
      * APM configuration interface to be used with CountlyConfig
      */
diff --git a/sdk/src/main/java/ly/count/android/sdk/ImmediateRequestMaker.java b/sdk/src/main/java/ly/count/android/sdk/ImmediateRequestMaker.java
index 30b087fd0..3f6df650b 100644
--- a/sdk/src/main/java/ly/count/android/sdk/ImmediateRequestMaker.java
+++ b/sdk/src/main/java/ly/count/android/sdk/ImmediateRequestMaker.java
@@ -31,8 +31,13 @@ public void doWork(@NonNull String requestData, @Nullable String customEndpoint,
         assert cp != null;
         assert log != null;
         assert callback != null;
-
-        this.execute(requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        if (Countly.sharedInstance().useSerialExecutorInternal) {
+            log.d("[ImmediateRequestMaker] Using serial executor");
+            this.execute(requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        } else {
+            log.d("[ImmediateRequestMaker] Using parallel executor");
+            this.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        }
     }
 
     /**
diff --git a/sdk/src/main/java/ly/count/android/sdk/PreflightRequestMaker.java b/sdk/src/main/java/ly/count/android/sdk/PreflightRequestMaker.java
index aa4f65828..e733316d7 100644
--- a/sdk/src/main/java/ly/count/android/sdk/PreflightRequestMaker.java
+++ b/sdk/src/main/java/ly/count/android/sdk/PreflightRequestMaker.java
@@ -18,8 +18,13 @@ public void doWork(@NonNull String requestData, @Nullable String customEndpoint,
         assert cp != null;
         assert log != null;
         assert callback != null;
-
-        this.execute(requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        if (Countly.sharedInstance().useSerialExecutorInternal) {
+            log.d("[PreflightRequestMaker] Using serial executor");
+            this.execute(requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        } else {
+            log.d("[PreflightRequestMaker] Using parallel executor");
+            this.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, requestData, customEndpoint, cp, requestShouldBeDelayed, networkingIsEnabled, callback, log);
+        }
     }
 
     /**