diff --git a/CHANGELOG.md b/CHANGELOG.md
index 730642281d..5ccd93ca59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
 
 ### Fixes
 
+- [#8350](https://github.com/blockscout/blockscout/pull/8350) - Add Base Mainnet support for tx actions
 - [#8282](https://github.com/blockscout/blockscout/pull/8282) - NFT fetcher improvements
 - [#8287](https://github.com/blockscout/blockscout/pull/8287) - Add separate hackney pool for TokenInstance fetchers
 - [#8293](https://github.com/blockscout/blockscout/pull/8293) - Add ETHEREUM_JSONRPC_TRACE_URL for Geth in docker-compose.yml
diff --git a/apps/indexer/lib/indexer/transform/transaction_actions.ex b/apps/indexer/lib/indexer/transform/transaction_actions.ex
index 549be9fa80..e4305c33c3 100644
--- a/apps/indexer/lib/indexer/transform/transaction_actions.ex
+++ b/apps/indexer/lib/indexer/transform/transaction_actions.ex
@@ -18,6 +18,7 @@ defmodule Indexer.Transform.TransactionActions do
   @goerli 5
   @optimism 10
   @polygon 137
+  @base_mainnet 8453
   @base_goerli 84531
   # @gnosis 100
 
@@ -161,7 +162,7 @@ defmodule Indexer.Transform.TransactionActions do
   end
 
   defp parse_uniswap_v3(logs, actions, protocols_to_rewrite, chain_id) do
-    if Enum.member?([@mainnet, @goerli, @optimism, @polygon, @base_goerli], chain_id) and
+    if Enum.member?([@mainnet, @goerli, @optimism, @polygon, @base_mainnet, @base_goerli], chain_id) and
          (is_nil(protocols_to_rewrite) or Enum.empty?(protocols_to_rewrite) or
             Enum.member?(protocols_to_rewrite, "uniswap_v3")) do
       uniswap_v3_positions_nft =