diff --git a/Cargo.lock b/Cargo.lock
index 2f8d56f..924c1b4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -452,7 +452,7 @@ dependencies = [
 [[package]]
 name = "ethereum-consensus"
 version = "0.1.0"
-source = "git+https://github.com/datachainlab/ethereum-light-client-rs?rev=v0.1.5#6c2b3b0f1a58c4df3eedeb9a36de0e7fcab25007"
+source = "git+https://github.com/datachainlab/ethereum-light-client-rs?rev=v0.1.6#e2026b51afde85d4bcf48633e22c7d7510d4ae69"
 dependencies = [
  "displaydoc",
  "hex",
@@ -478,7 +478,7 @@ dependencies = [
 [[package]]
 name = "ethereum-ibc"
 version = "0.1.0"
-source = "git+https://github.com/datachainlab/ethereum-ibc-rs?rev=v0.0.17#23cba6fe3ff87df2ac8d4350a49a4c2811e5e156"
+source = "git+https://github.com/datachainlab/ethereum-ibc-rs?rev=v0.0.18#80ea9cc3fb55a8231d0de952df42bffd35d30c90"
 dependencies = [
  "bytes",
  "displaydoc",
@@ -498,7 +498,7 @@ dependencies = [
 [[package]]
 name = "ethereum-ibc-proto"
 version = "0.1.0"
-source = "git+https://github.com/datachainlab/ethereum-ibc-rs?rev=v0.0.17#23cba6fe3ff87df2ac8d4350a49a4c2811e5e156"
+source = "git+https://github.com/datachainlab/ethereum-ibc-rs?rev=v0.0.18#80ea9cc3fb55a8231d0de952df42bffd35d30c90"
 dependencies = [
  "prost",
  "serde",
@@ -507,7 +507,7 @@ dependencies = [
 [[package]]
 name = "ethereum-light-client-verifier"
 version = "0.1.0"
-source = "git+https://github.com/datachainlab/ethereum-light-client-rs?rev=v0.1.5#6c2b3b0f1a58c4df3eedeb9a36de0e7fcab25007"
+source = "git+https://github.com/datachainlab/ethereum-light-client-rs?rev=v0.1.6#e2026b51afde85d4bcf48633e22c7d7510d4ae69"
 dependencies = [
  "displaydoc",
  "ethereum-consensus",
diff --git a/Cargo.toml b/Cargo.toml
index bc702e8..d87b300 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,4 +9,4 @@ displaydoc = { version = "0.2", default-features = false }
 tiny-keccak = { version = "1.4" }
 
 light-client = { git = "https://github.com/datachainlab/lcp", rev = "v0.2.11", default-features = false, features = ["ibc"] }
-ethereum-ibc = { git = "https://github.com/datachainlab/ethereum-ibc-rs", rev = "v0.0.17", default-features = false }
+ethereum-ibc = { git = "https://github.com/datachainlab/ethereum-ibc-rs", rev = "v0.0.18", default-features = false }
diff --git a/README.md b/README.md
index 85efb34..89f8ffc 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,6 @@
 
 [![test](https://github.com/datachainlab/ethereum-elc/actions/workflows/test.yml/badge.svg)](https://github.com/datachainlab/ethereum-elc/actions/workflows/test.yml)
 
-ELC implementation based on [ethereum-ibc-rs](https://github.com/datachainlab/ethereum-ibc-rs).
+`ethereum-elc` is an ELC(Enclave Light Client) implementation of Ethereum based on [ethereum-ibc-rs](https://github.com/datachainlab/ethereum-ibc-rs).
+
+The spec of the light client is [here](https://github.com/datachainlab/ethereum-ibc-rs/blob/main/README.md).