diff --git a/core/chains/evm/config/toml/defaults/Astar_Mainnet.toml b/core/chains/evm/config/toml/defaults/Astar_Mainnet.toml
new file mode 100644
index 0000000000..2d356d9564
--- /dev/null
+++ b/core/chains/evm/config/toml/defaults/Astar_Mainnet.toml
@@ -0,0 +1,10 @@
+ChainID = '592'
+# FinalityTag will be enabled once the custom tag is implemented
+# FinalityTagEnabled = true
+FinalityDepth = 100
+LogPollInterval = '6s'
+
+[GasEstimator]
+EIP1559DynamicFees = false
+PriceMax = '100000 gwei'
+LimitDefault = 8000000
\ No newline at end of file
diff --git a/core/chains/evm/config/toml/defaults/Astar_Shibuya.toml b/core/chains/evm/config/toml/defaults/Astar_Shibuya.toml
new file mode 100644
index 0000000000..36f42b7f02
--- /dev/null
+++ b/core/chains/evm/config/toml/defaults/Astar_Shibuya.toml
@@ -0,0 +1,10 @@
+ChainID = '81'
+# FinalityTag will be enabled once the custom tag is implemented
+# FinalityTagEnabled = true
+FinalityDepth = 100
+LogPollInterval = '6s'
+
+[GasEstimator]
+EIP1559DynamicFees = false
+PriceMax = '100000 gwei'
+LimitDefault = 8000000
\ No newline at end of file