diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4122bdd62b..1a49244ba0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,16 @@ Changelog for the runtimes governed by the Polkadot Fellowship.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [Unreleased]
+## [1.2.6] 13.06.2024
+
+Note: This release only affects the following runtimes and is not a full system release:
+
+- Polkadot Relay Chain
+- Polkadot Asset Hub
+- Polkadot People
+- Kusama Relay Chain
+- Kusama Asset Hub
+- Kusama People
 
 ### Added
 
diff --git a/relay/kusama/src/lib.rs b/relay/kusama/src/lib.rs
index 2c81b5268c..ded3ff7838 100644
--- a/relay/kusama/src/lib.rs
+++ b/relay/kusama/src/lib.rs
@@ -161,7 +161,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("kusama"),
 	impl_name: create_runtime_str!("parity-kusama"),
 	authoring_version: 2,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 26,
diff --git a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
index 1e0ad3b0a3..6af57dad08 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
@@ -112,7 +112,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("statemine"),
 	impl_name: create_runtime_str!("statemine"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 15,
@@ -128,7 +128,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("statemine"),
 	impl_name: create_runtime_str!("statemine"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 15,
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
index 3f5d1a65bb..e7de6ca0a8 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
@@ -146,7 +146,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("statemint"),
 	impl_name: create_runtime_str!("statemint"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 15,
diff --git a/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs b/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
index a12f23e4b3..a04370ad49 100644
--- a/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
@@ -166,7 +166,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("bridge-hub-kusama"),
 	impl_name: create_runtime_str!("bridge-hub-kusama"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 5,
diff --git a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
index 6c82529b91..0ca3bb2db0 100644
--- a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
@@ -179,7 +179,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("bridge-hub-polkadot"),
 	impl_name: create_runtime_str!("bridge-hub-polkadot"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 4,
diff --git a/system-parachains/collectives/collectives-polkadot/src/lib.rs b/system-parachains/collectives/collectives-polkadot/src/lib.rs
index d9fcdf62aa..22209336a1 100644
--- a/system-parachains/collectives/collectives-polkadot/src/lib.rs
+++ b/system-parachains/collectives/collectives-polkadot/src/lib.rs
@@ -115,7 +115,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("collectives"),
 	impl_name: create_runtime_str!("collectives"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 7,
diff --git a/system-parachains/coretime/coretime-kusama/src/lib.rs b/system-parachains/coretime/coretime-kusama/src/lib.rs
index 2f0754ce62..4df9a13435 100644
--- a/system-parachains/coretime/coretime-kusama/src/lib.rs
+++ b/system-parachains/coretime/coretime-kusama/src/lib.rs
@@ -134,7 +134,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("coretime-kusama"),
 	impl_name: create_runtime_str!("coretime-kusama"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
diff --git a/system-parachains/encointer/src/lib.rs b/system-parachains/encointer/src/lib.rs
index 68389d8430..0bfa686116 100644
--- a/system-parachains/encointer/src/lib.rs
+++ b/system-parachains/encointer/src/lib.rs
@@ -125,7 +125,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("encointer-parachain"),
 	impl_name: create_runtime_str!("encointer-parachain"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 4,
diff --git a/system-parachains/gluttons/glutton-kusama/src/lib.rs b/system-parachains/gluttons/glutton-kusama/src/lib.rs
index 0431a2e0ce..82a33b746b 100644
--- a/system-parachains/gluttons/glutton-kusama/src/lib.rs
+++ b/system-parachains/gluttons/glutton-kusama/src/lib.rs
@@ -89,7 +89,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("glutton"),
 	impl_name: create_runtime_str!("glutton"),
 	authoring_version: 1,
-	spec_version: 1_002_005,
+	spec_version: 1_002_006,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,