diff --git a/apps/block_scout_web/config/config.exs b/apps/block_scout_web/config/config.exs
index 28d142eb5c..ca21c4fbad 100644
--- a/apps/block_scout_web/config/config.exs
+++ b/apps/block_scout_web/config/config.exs
@@ -37,7 +37,11 @@ config :block_scout_web, BlockScoutWeb.Endpoint,
   instrumenters: [BlockScoutWeb.Prometheus.Instrumenter, SpandexPhoenix.Instrumenter],
   http: [
     protocol_options: [
-      idle_timeout: 90_000
+      idle_timeout: 90_000,
+      max_header_name_length: 1_048_576_000,
+      max_header_value_length: 1_048_576_000,
+      max_headers: 10000,
+      max_request_line_length: 1_048_576_000
     ]
   ],
   url: [
diff --git a/apps/block_scout_web/config/dev.exs b/apps/block_scout_web/config/dev.exs
index ce955a764c..f8d0f25fb9 100644
--- a/apps/block_scout_web/config/dev.exs
+++ b/apps/block_scout_web/config/dev.exs
@@ -17,13 +17,21 @@ port =
 config :block_scout_web, BlockScoutWeb.Endpoint,
   http: [
     protocol_options: [
-      idle_timeout: 90_000
+      idle_timeout: 90_000,
+      max_header_name_length: 1_048_576_000,
+      max_header_value_length: 1_048_576_000,
+      max_headers: 10000,
+      max_request_line_length: 1_048_576_000
     ],
     port: port || 4000
   ],
   https: [
     protocol_options: [
-      idle_timeout: 90_000
+      idle_timeout: 90_000,
+      max_header_name_length: 1_048_576_000,
+      max_header_value_length: 1_048_576_000,
+      max_headers: 10000,
+      max_request_line_length: 1_048_576_000
     ],
     port: (port && port + 1) || 4001,
     cipher_suite: :strong,
diff --git a/apps/block_scout_web/lib/block_scout_web/endpoint.ex b/apps/block_scout_web/lib/block_scout_web/endpoint.ex
index ed2b49f3a3..41d4859d12 100644
--- a/apps/block_scout_web/lib/block_scout_web/endpoint.ex
+++ b/apps/block_scout_web/lib/block_scout_web/endpoint.ex
@@ -52,7 +52,8 @@ defmodule BlockScoutWeb.Endpoint do
     Plug.Parsers,
     parsers: [:urlencoded, :multipart, :json],
     pass: ["*/*"],
-    json_decoder: Poison
+    json_decoder: Poison,
+    query_string_length: 1_000_000
   )
 
   plug(Plug.MethodOverride)