diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4df9f9607..e5e30b68fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 - [#6257](https://github.com/blockscout/blockscout/pull/6257), [#6276](https://github.com/blockscout/blockscout/pull/6276) - DISABLE_TOKEN_INSTANCE_FETCHER env variable
 - [#6391](https://github.com/blockscout/blockscout/pull/6391), [#6427](https://github.com/blockscout/blockscout/pull/6427) - TokenTransfer token_id -> token_ids migration
 - [#6443](https://github.com/blockscout/blockscout/pull/6443) - Drop internal transactions order index
+- [#6450](https://github.com/blockscout/blockscout/pull/6450) - INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE and INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY env variables
 
 ### Fixes
 
diff --git a/apps/indexer/lib/indexer/fetcher/internal_transaction.ex b/apps/indexer/lib/indexer/fetcher/internal_transaction.ex
index 681a8cd97c..dba1ed36f8 100644
--- a/apps/indexer/lib/indexer/fetcher/internal_transaction.ex
+++ b/apps/indexer/lib/indexer/fetcher/internal_transaction.ex
@@ -21,16 +21,8 @@ defmodule Indexer.Fetcher.InternalTransaction do
 
   @behaviour BufferedTask
 
-  @max_batch_size 10
-  @max_concurrency 4
-  @defaults [
-    flush_interval: :timer.seconds(3),
-    max_concurrency: @max_concurrency,
-    max_batch_size: @max_batch_size,
-    poll: true,
-    task_supervisor: Indexer.Fetcher.InternalTransaction.TaskSupervisor,
-    metadata: [fetcher: :internal_transaction]
-  ]
+  @default_max_batch_size 10
+  @default_max_concurrency 4
 
   @doc """
   Asynchronously fetches internal transactions.
@@ -68,7 +60,7 @@ defmodule Indexer.Fetcher.InternalTransaction do
     end
 
     merged_init_opts =
-      @defaults
+      defaults()
       |> Keyword.merge(mergeable_init_options)
       |> Keyword.put(:state, state)
 
@@ -273,4 +265,15 @@ defmodule Indexer.Fetcher.InternalTransaction do
       end
     end)
   end
+
+  defp defaults do
+    [
+      flush_interval: :timer.seconds(3),
+      max_concurrency: Application.get_env(:indexer, __MODULE__)[:concurrency] || @default_max_concurrency,
+      max_batch_size: Application.get_env(:indexer, __MODULE__)[:batch_size] || @default_max_batch_size,
+      poll: true,
+      task_supervisor: Indexer.Fetcher.InternalTransaction.TaskSupervisor,
+      metadata: [fetcher: :internal_transaction]
+    ]
+  end
 end
diff --git a/config/runtime.exs b/config/runtime.exs
index 668524a7fb..50cd63f2b0 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -467,6 +467,16 @@ config :indexer, Indexer.Block.Catchup.Fetcher,
   batch_size: blocks_catchup_fetcher_batch_size,
   concurrency: blocks_catchup_fetcher_concurrency
 
+{internal_transaction_fetcher_batch_size, _} =
+  Integer.parse(System.get_env("INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE", "10"))
+
+{internal_transaction_fetcher_concurrency, _} =
+  Integer.parse(System.get_env("INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY", "4"))
+
+config :indexer, Indexer.Fetcher.InternalTransaction,
+  batch_size: internal_transaction_fetcher_batch_size,
+  concurrency: internal_transaction_fetcher_concurrency
+
 Code.require_file("#{config_env()}.exs", "config/runtime")
 
 for config <- "../apps/*/config/runtime/#{config_env()}.exs" |> Path.expand(__DIR__) |> Path.wildcard() do
diff --git a/docker-compose/envs/common-blockscout.env b/docker-compose/envs/common-blockscout.env
index 6f9a4a8779..cffb1aac85 100644
--- a/docker-compose/envs/common-blockscout.env
+++ b/docker-compose/envs/common-blockscout.env
@@ -84,6 +84,8 @@ INDEXER_DISABLE_PENDING_TRANSACTIONS_FETCHER=false
 INDEXER_DISABLE_INTERNAL_TRANSACTIONS_FETCHER=false
 # INDEXER_CATCHUP_BLOCKS_BATCH_SIZE=
 # INDEXER_CATCHUP_BLOCKS_CONCURRENCY=
+# INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE=
+# INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY=
 # TOKEN_ID_MIGRATION_FIRST_BLOCK=
 # TOKEN_ID_MIGRATION_CONCURRENCY=
 # TOKEN_ID_MIGRATION_BATCH_SIZE=
diff --git a/docker/Makefile b/docker/Makefile
index e674a0a1d7..8382fdbdbd 100644
--- a/docker/Makefile
+++ b/docker/Makefile
@@ -454,6 +454,12 @@ endif
 ifdef INDEXER_CATCHUP_BLOCKS_CONCURRENCY
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_CATCHUP_BLOCKS_CONCURRENCY=$(INDEXER_CATCHUP_BLOCKS_CONCURRENCY)'
 endif
+ifdef INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE
+    BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE=$(INDEXER_INTERNAL_TRANSACTIONS_BATCH_SIZE)'
+endif
+ifdef INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY
+    BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY=$(INDEXER_INTERNAL_TRANSACTIONS_CONCURRENCY)'
+endif
 ifdef INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE=$(INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE)'
 endif