diff --git a/webserver/webserver/src/main/java/io/helidon/webserver/SocketConfiguration.java b/webserver/webserver/src/main/java/io/helidon/webserver/SocketConfiguration.java
index 98a5019e7d0..67093ff1251 100644
--- a/webserver/webserver/src/main/java/io/helidon/webserver/SocketConfiguration.java
+++ b/webserver/webserver/src/main/java/io/helidon/webserver/SocketConfiguration.java
@@ -587,7 +587,7 @@ default B config(Config config) {
             config.get("backlog").asInt().ifPresent(this::backlog);
             config.get("max-header-size").asInt().ifPresent(this::maxHeaderSize);
             config.get("max-initial-line-length").asInt().ifPresent(this::maxInitialLineLength);
-            config.get("max-payload-size").asInt().ifPresent(this::maxPayloadSize);
+            config.get("max-payload-size").asLong().ifPresent(this::maxPayloadSize);
 
             DeprecatedConfig.get(config, "timeout-millis", "timeout")
                     .asInt()
diff --git a/webserver/webserver/src/test/java/io/helidon/webserver/MaxPayloadSizeTest.java b/webserver/webserver/src/test/java/io/helidon/webserver/MaxPayloadSizeTest.java
index 4fd6071e8d7..b978a0c68a8 100644
--- a/webserver/webserver/src/test/java/io/helidon/webserver/MaxPayloadSizeTest.java
+++ b/webserver/webserver/src/test/java/io/helidon/webserver/MaxPayloadSizeTest.java
@@ -17,6 +17,7 @@
 package io.helidon.webserver;
 
 import java.nio.charset.Charset;
+import java.util.Map;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.Flow;
 import java.util.concurrent.TimeUnit;
@@ -25,6 +26,8 @@
 import io.helidon.common.http.DataChunk;
 import io.helidon.common.http.Http;
 import io.helidon.common.http.MediaType;
+import io.helidon.config.Config;
+import io.helidon.config.ConfigSources;
 import io.helidon.webclient.WebClient;
 import io.helidon.webclient.WebClientRequestBuilder;
 import io.helidon.webclient.WebClientResponse;
@@ -188,6 +191,18 @@ public void testMixedGoodAndBadPayloads() {
         assertThat(response.status().code(), is(Http.Status.OK_200.code()));
     }
 
+    /**
+     * Verify fix for 7783
+     */
+    @Test
+    public void testMaxLongMaxPayloadSizeFromConfig() {
+        final long MAX_PAYLOAD_SIZE = Long.MAX_VALUE;
+        Config justConfig = Config.just(ConfigSources.create(Map.of("max-payload-size", Long.toString(MAX_PAYLOAD_SIZE))).build());
+        WebServer webServer = WebServer.builder().config(justConfig).build();
+        assertThat(webServer.configuration().namedSocket(WebServer.DEFAULT_SOCKET_NAME).get().maxPayloadSize(),
+                is(Long.MAX_VALUE));
+    }
+
     /**
      * Publishes the same chunk multiple times. If number of times is greater than
      * one, Helidon will send content using chunked encoding.