diff --git a/Cargo.toml b/Cargo.toml
index 7d24bb7b0..a6380cd5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace.package]
-version = "2.0.0"
+version = "1.2.0"
 authors = ["Webb Technologies Inc."]
 edition = "2021"
 license = "Unlicense"
diff --git a/runtime/mainnet/src/lib.rs b/runtime/mainnet/src/lib.rs
index a5894ec95..c7ca8ae2a 100644
--- a/runtime/mainnet/src/lib.rs
+++ b/runtime/mainnet/src/lib.rs
@@ -163,7 +163,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("tangle"),
 	impl_name: create_runtime_str!("tangle"),
 	authoring_version: 1,
-	spec_version: 2000, // v2.0.0
+	spec_version: 1200, // v1.2.0
 	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
diff --git a/runtime/testnet/src/lib.rs b/runtime/testnet/src/lib.rs
index b663df941..5985cb490 100644
--- a/runtime/testnet/src/lib.rs
+++ b/runtime/testnet/src/lib.rs
@@ -173,7 +173,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("tangle-testnet"),
 	impl_name: create_runtime_str!("tangle-testnet"),
 	authoring_version: 1,
-	spec_version: 2000, // v2.0.0
+	spec_version: 1200, // v1.2.0
 	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,