diff --git a/.yarn/versions/aa00b5c3.yml b/.yarn/versions/aa00b5c3.yml
new file mode 100644
index 000000000..17d8178f9
--- /dev/null
+++ b/.yarn/versions/aa00b5c3.yml
@@ -0,0 +1,6 @@
+releases:
+  "@fluent-wallet/eth_estimate-1559-fee": patch
+  "@fluent-wallet/eth_fee-history": patch
+
+declined:
+  - helios-background
diff --git a/packages/rpcs/eth_estimate1559Fee/index.js b/packages/rpcs/eth_estimate1559Fee/index.js
index 89dd32ef1..19fcf13b3 100644
--- a/packages/rpcs/eth_estimate1559Fee/index.js
+++ b/packages/rpcs/eth_estimate1559Fee/index.js
@@ -21,7 +21,7 @@ export const permissions = {
 //Gas station url for EIP1559
 export const GAS_API_BASE_URL = 'https://gas-api.metaswap.codefi.network'
 // How many blocks to consider for priority fee estimation
-const FEE_HISTORY_BLOCKS = 5
+const FEE_HISTORY_BLOCKS = '0x5'
 // Levels of priority fee
 const PRIORITY_LEVELS = ['low', 'medium', 'high']
 const SETTINGS_BY_PRIORITY_LEVEL = {
diff --git a/packages/rpcs/eth_feeHistory/index.js b/packages/rpcs/eth_feeHistory/index.js
index df3cf384d..e7e02a1b0 100644
--- a/packages/rpcs/eth_feeHistory/index.js
+++ b/packages/rpcs/eth_feeHistory/index.js
@@ -5,6 +5,7 @@ import {
   or,
   zeroOrMore,
   number,
+  string,
   schema,
 } from '@fluent-wallet/spec'
 
@@ -12,7 +13,7 @@ export const NAME = 'eth_feeHistory'
 export const schemas = {
   input: [
     cat,
-    number,
+    string,
     [or, blockRef, Uint],
     [schema, [zeroOrMore, [number, {max: 100, min: 1}]]],
   ],
diff --git a/yarn.lock b/yarn.lock
index 09333d1c0..9c109a771 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -15046,7 +15046,7 @@ __metadata:
   version: 1.4.2
   resolution: "eth-sig-util@npm:1.4.2"
   dependencies:
-    ethereumjs-abi: "git+https://github.com/ethereumjs/ethereumjs-abi.git"
+    ethereumjs-abi: ^0.6.8
     ethereumjs-util: ^5.1.1
   checksum: 578f5c571c1bb0a86dc1bd4a5b56b8073b37823496d7afa74d772cf91ae6860f91bafcbee931be39a3d13f0c195df9f026a27fce350605ad5d15901a5a4ea94a
   languageName: node
@@ -15140,16 +15140,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ethereumjs-abi@git+https://github.com/ethereumjs/ethereumjs-abi.git":
-  version: 0.6.8
-  resolution: "ethereumjs-abi@https://github.com/ethereumjs/ethereumjs-abi.git#commit=ee3994657fa7a427238e6ba92a84d0b529bbcde0"
-  dependencies:
-    bn.js: ^4.11.8
-    ethereumjs-util: ^6.0.0
-  checksum: ae074be0bb012857ab5d3ae644d1163b908a48dd724b7d2567cfde309dc72222d460438f2411936a70dc949dc604ce1ef7118f7273bd525815579143c907e336
-  languageName: node
-  linkType: hard
-
 "ethereumjs-abi@npm:0.6.5":
   version: 0.6.5
   resolution: "ethereumjs-abi@npm:0.6.5"