diff --git a/loki-log4j2-appender/src/main/java/pl/tkowalcz/tjahzi/log4j2/LokiAppenderBuilder.java b/loki-log4j2-appender/src/main/java/pl/tkowalcz/tjahzi/log4j2/LokiAppenderBuilder.java
index 51f0876..f58ff39 100644
--- a/loki-log4j2-appender/src/main/java/pl/tkowalcz/tjahzi/log4j2/LokiAppenderBuilder.java
+++ b/loki-log4j2-appender/src/main/java/pl/tkowalcz/tjahzi/log4j2/LokiAppenderBuilder.java
@@ -58,7 +58,7 @@ public class LokiAppenderBuilder<B extends LokiAppenderBuilder<B>> extends Abstr
     private String logLevelLabel;
 
     @PluginBuilderAttribute
-    private int maxRequestsInFlight;
+    private int maxRequestsInFlight = 100;
 
     @PluginElement("Headers")
     private Header[] headers;
diff --git a/tjahzi-core/src/main/java/pl/tkowalcz/tjahzi/http/ClientConfigurationBuilder.java b/tjahzi-core/src/main/java/pl/tkowalcz/tjahzi/http/ClientConfigurationBuilder.java
index 38ac480..d0ebc19 100644
--- a/tjahzi-core/src/main/java/pl/tkowalcz/tjahzi/http/ClientConfigurationBuilder.java
+++ b/tjahzi-core/src/main/java/pl/tkowalcz/tjahzi/http/ClientConfigurationBuilder.java
@@ -7,7 +7,7 @@ public class ClientConfigurationBuilder {
     public static final int DEFAULT_CONNECT_TIMEOUT_MILLIS = 5_000;
     public static final int DEFAULT_REQUEST_TIMEOUT_MILLIS = 60_000;
 
-    public static final int DEFAULT_MAX_REQUESTS_IN_FLIGHT = 10;
+    public static final int DEFAULT_MAX_REQUESTS_IN_FLIGHT = 100;
 
     public static final int DEFAULT_MAX_RETRIES = 0;
 
@@ -57,6 +57,10 @@ public class ClientConfigurationBuilder {
     }
 
     public ClientConfiguration build() {
+        if (maxRequestsInFlight <= 0) {
+            throw new IllegalArgumentException("Property maxRequestsInFlight must be greater than 0");
+        }
+
         return new ClientConfiguration(
                 logEndpoint,
                 host,