diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50b5a403ad..3375040a77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 ## Unreleased Changes
 
+## v0.0.6
+*December 23, 2020*
+
+This release focuses on upgrading the relayer and ibc modules to the latest interfaces from the ecosystem:
+tendermint-rs `v0.17`, which brings the protobuf changes from tendermint `v0.34.0`, plus alignment with
+the latest cosmos proto versions from `v0.40.0-rc5` (sometimes called 'stargate-5').
+
 ### FEATURES
 - Update to tendermint-rs version `0.17` ([#451])
 - Update to cosmos-sdk IBC proto version `v0.40.0-rc5` ([#451])
diff --git a/modules/Cargo.toml b/modules/Cargo.toml
index c62464c03a..d112157200 100644
--- a/modules/Cargo.toml
+++ b/modules/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name       = "ibc"
-version    = "0.0.5"
+version    = "0.0.6"
 edition    = "2018"
 license    = "Apache-2.0"
 readme     = "README.md"
@@ -21,7 +21,7 @@ mocks = [ "tendermint-testgen" ]
 
 [dependencies]
 # Proto definitions for all IBC-related interfaces, e.g., connections or channels.
-ibc-proto = { version = "0.5.0", path = "../proto" }
+ibc-proto = { version = "0.6.0", path = "../proto" }
 ics23 = "0.6.0"
 anomaly = "0.2.0"
 chrono = "0.4"
@@ -51,10 +51,10 @@ version = "=0.17.0"
 version = "=0.17.0"
 
 [dependencies.tendermint-testgen]
-version = "0.17.0"
+version = "=0.17.0"
 optional = true
 
 [dev-dependencies]
 tokio = { version = "0.2", features = ["macros"] }
 subtle-encoding = { version = "0.5" }
-tendermint-testgen = { version = "0.17.0" } # Needed for generating (synthetic) light blocks.
+tendermint-testgen = { version = "=0.17.0" } # Needed for generating (synthetic) light blocks.
diff --git a/proto-compiler/Cargo.toml b/proto-compiler/Cargo.toml
index c011c14106..c557ece41e 100644
--- a/proto-compiler/Cargo.toml
+++ b/proto-compiler/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name    = "ibc-proto-compiler"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Greg Szabo <greg@philosobear.com>"]
 edition = "2018"
 publish = false
diff --git a/proto/Cargo.toml b/proto/Cargo.toml
index 59ceed0a8a..7010326797 100644
--- a/proto/Cargo.toml
+++ b/proto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ibc-proto"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Greg Szabo <greg@informal.systems>"]
 edition = "2018"
 license = "Apache-2.0"
diff --git a/relayer-cli/Cargo.toml b/relayer-cli/Cargo.toml
index 2288c1a96e..63e33ee468 100644
--- a/relayer-cli/Cargo.toml
+++ b/relayer-cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "relayer-cli"
-version = "0.0.5"
+version = "0.0.6"
 edition = "2018"
 authors = [
   "Informal Systems <hello@informal.systems>"
@@ -9,7 +9,7 @@ authors = [
 [dependencies]
 relayer = { path = "../relayer" }
 ibc = { path = "../modules" }
-ibc-proto = { version = "0.5.0", path = "../proto" }
+ibc-proto = { version = "0.6.0", path = "../proto" }
 anomaly = "0.2.0"
 gumdrop = "0.7"
 serde = { version = "1", features = ["serde_derive"] }
diff --git a/relayer/Cargo.toml b/relayer/Cargo.toml
index 4d0ac1bdda..ec5acf0454 100644
--- a/relayer/Cargo.toml
+++ b/relayer/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "relayer"
-version = "0.0.5"
+version = "0.0.6"
 edition = "2018"
 authors = [
   "Informal Systems <hello@informal.systems>"
@@ -9,7 +9,7 @@ authors = [
 [dependencies]
 subtle-encoding = "0.5"
 ibc = { path = "../modules" }
-ibc-proto = { version = "0.5.0", path = "../proto" }
+ibc-proto = { version = "0.6.0", path = "../proto" }
 anomaly = "0.2.0"
 async-trait = "0.1.24"
 humantime-serde = "1.0.0"
@@ -57,4 +57,4 @@ version = "=0.17.0"
 [dev-dependencies]
 serial_test = "0.5.0"
 ibc = { path = "../modules", features = [ "mocks" ] }
-tendermint-testgen = { version = "0.17.0" } # Needed for generating (synthetic) light blocks.
+tendermint-testgen = { version = "=0.17.0" } # Needed for generating (synthetic) light blocks.