diff --git a/Cargo.lock b/Cargo.lock
index 17b28ad..818e78b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -978,7 +978,7 @@ dependencies = [
  "once_cell",
  "serde",
  "serde_json",
- "tendermint",
+ "tendermint 0.40.0",
  "tendermint-rpc",
  "thiserror",
  "tokio",
@@ -1748,7 +1748,35 @@ dependencies = [
  "signature",
  "subtle",
  "subtle-encoding",
- "tendermint-proto",
+ "tendermint-proto 0.39.1",
+ "time",
+ "zeroize",
+]
+
+[[package]]
+name = "tendermint"
+version = "0.40.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37d513ce7f9e41c67ab2dd3d554ef65f36fbcc61745af1e1f93eafdeefa1ce37"
+dependencies = [
+ "bytes",
+ "digest 0.10.7",
+ "ed25519",
+ "ed25519-consensus",
+ "flex-error",
+ "futures",
+ "num-traits",
+ "once_cell",
+ "prost",
+ "serde",
+ "serde_bytes",
+ "serde_json",
+ "serde_repr",
+ "sha2 0.10.8",
+ "signature",
+ "subtle",
+ "subtle-encoding",
+ "tendermint-proto 0.40.0",
  "time",
  "zeroize",
 ]
@@ -1762,7 +1790,7 @@ dependencies = [
  "flex-error",
  "serde",
  "serde_json",
- "tendermint",
+ "tendermint 0.39.1",
  "toml",
  "url",
 ]
@@ -1782,6 +1810,21 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "tendermint-proto"
+version = "0.40.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c81ba1b023ec00763c3bc4f4376c67c0047f185cccf95c416c7a2f16272c4cbb"
+dependencies = [
+ "bytes",
+ "flex-error",
+ "prost",
+ "serde",
+ "serde_bytes",
+ "subtle-encoding",
+ "time",
+]
+
 [[package]]
 name = "tendermint-rpc"
 version = "0.39.1"
@@ -1803,9 +1846,9 @@ dependencies = [
  "serde_json",
  "subtle",
  "subtle-encoding",
- "tendermint",
+ "tendermint 0.39.1",
  "tendermint-config",
- "tendermint-proto",
+ "tendermint-proto 0.39.1",
  "thiserror",
  "time",
  "tokio",
diff --git a/Cargo.toml b/Cargo.toml
index fb275b0..2f27300 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ hyper = "0.14"
 hyper-tls = "0.5"
 serde = { version = "1", features = ["serde_derive"] }
 serde_json = "1.0"
-tendermint = "0.39"
+tendermint = "0.40"
 tendermint-rpc = { version = "0.39", features = ["http-client"] }
 thiserror = "1"
 tokio = "1"