diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8587607d..6dbb2af08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@
 ### Improvements
 - [#1169](https://github.com/crypto-org-chain/chain-main/pull/1169) Update linter and tidy up code
 
+*July 9, 2025*
+
+## v6.0.0-2
+- [#1174](https://github.com/crypto-org-chain/chain-main/pull/1174) Replace cosmos sdk fork with official version.
+
 *May 26, 2025*
 
 ## v6.0.0
diff --git a/app/upgrades.go b/app/upgrades.go
index 69ce99ebf..38a6851ea 100644
--- a/app/upgrades.go
+++ b/app/upgrades.go
@@ -179,6 +179,13 @@ func (app *ChainApp) RegisterUpgradeHandlers(cdc codec.BinaryCodec) {
 		// configure store loader that checks if version == upgradeHeight and applies store upgrades
 		app.SetStoreLoader(upgradetypes.UpgradeStoreLoader(upgradeInfo.Height, &storeUpgrades))
 	}
+
+	// Dummy upgrade handler for testnet as it has already been upgraded
+	testnetPlanName := "v6.0.0-testnet"
+	app.UpgradeKeeper.SetUpgradeHandler(testnetPlanName, func(ctx context.Context, plan upgradetypes.Plan, fromVM module.VersionMap) (module.VersionMap, error) {
+		// All the module should be at their latest version already, this method should return without doing anything
+		return app.ModuleManager.RunMigrations(ctx, app.configurator, fromVM)
+	})
 }
 
 func UpdateExpeditedParams(ctx context.Context, gov govkeeper.Keeper) error {
diff --git a/default.nix b/default.nix
index 61ebbfbec..97455f8d5 100644
--- a/default.nix
+++ b/default.nix
@@ -39,7 +39,7 @@ let
 in
 buildGoApplication rec {
   pname = "chain-maind";
-  version = "v6.0.0";
+  version = "v6.0.0-2";
   go = buildPackages.go_1_23;
   src = lib.cleanSourceWith {
     name = "src";
diff --git a/go.mod b/go.mod
index 0fd4b1eea..d89e99b81 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	cosmossdk.io/x/upgrade v0.1.4
 	github.com/cometbft/cometbft v0.38.17
 	github.com/cosmos/cosmos-db v1.1.1
-	github.com/cosmos/cosmos-sdk v0.50.13
+	github.com/cosmos/cosmos-sdk v0.50.14
 	github.com/cosmos/gogoproto v1.7.0
 	github.com/cosmos/ibc-go/modules/capability v1.0.1
 	github.com/cosmos/ibc-go/v8 v8.7.0
@@ -229,9 +229,6 @@ replace (
 replace (
 	// use cosmos fork of keyring
 	github.com/99designs/keyring => github.com/cosmos/keyring v1.2.0
-
-	// release/chain-main/v0.50.x
-	github.com/cosmos/cosmos-sdk => github.com/crypto-org-chain/cosmos-sdk v0.50.6-0.20250515092613-f67eec43305b
 	// dgrijalva/jwt-go is deprecated and doesn't receive security updates.
 	// TODO: remove it: https://github.com/cosmos/cosmos-sdk/issues/13134
 	github.com/dgrijalva/jwt-go => github.com/golang-jwt/jwt/v4 v4.4.2
diff --git a/go.sum b/go.sum
index cd090087b..c1cac7256 100644
--- a/go.sum
+++ b/go.sum
@@ -421,6 +421,8 @@ github.com/cosmos/cosmos-db v1.1.1 h1:FezFSU37AlBC8S98NlSagL76oqBRWq/prTPvFcEJNC
 github.com/cosmos/cosmos-db v1.1.1/go.mod h1:AghjcIPqdhSLP/2Z0yha5xPH3nLnskz81pBx3tcVSAw=
 github.com/cosmos/cosmos-proto v1.0.0-beta.5 h1:eNcayDLpip+zVLRLYafhzLvQlSmyab+RC5W7ZfmxJLA=
 github.com/cosmos/cosmos-proto v1.0.0-beta.5/go.mod h1:hQGLpiIUloJBMdQMMWb/4wRApmI9hjHH05nefC0Ojec=
+github.com/cosmos/cosmos-sdk v0.50.14 h1:G8CtGHFWbExa+ZpVOVAb4kFmko/R30igsYOwyzRMtgY=
+github.com/cosmos/cosmos-sdk v0.50.14/go.mod h1:hrWEFMU1eoXqLJeE6VVESpJDQH67FS1nnMrQIjO2daw=
 github.com/cosmos/go-bip39 v1.0.0 h1:pcomnQdrdH22njcAatO0yWojsUnCO3y2tNoV1cb6hHY=
 github.com/cosmos/go-bip39 v1.0.0/go.mod h1:RNJv0H/pOIVgxw6KS7QeX2a0Uo0aKUlfhZ4xuwvCdJw=
 github.com/cosmos/gogogateway v1.2.0 h1:Ae/OivNhp8DqBi/sh2A8a1D0y638GpL3tkmLQAiKxTE=
@@ -453,8 +455,6 @@ github.com/creachadair/tomledit v0.0.24 h1:5Xjr25R2esu1rKCbQEmjZYlrhFkDspoAbAKb6
 github.com/creachadair/tomledit v0.0.24/go.mod h1:9qHbShRWQzSCcn617cMzg4eab1vbLCOjOshAWSzWr8U=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/crypto-org-chain/cosmos-sdk v0.50.6-0.20250515092613-f67eec43305b h1:gIBPJumFHfzuwmdReRANQTyWQKK/Vh2LHlpKdSrlqeA=
-github.com/crypto-org-chain/cosmos-sdk v0.50.6-0.20250515092613-f67eec43305b/go.mod h1:hrWEFMU1eoXqLJeE6VVESpJDQH67FS1nnMrQIjO2daw=
 github.com/crypto-org-chain/cronos/memiavl v0.0.5-0.20241028093154-0f94930c27ce h1:yRF9Zsk4fzVBhBQEjkA4oE+Q3Q/Kgaj/UX4gK+xwaAs=
 github.com/crypto-org-chain/cronos/memiavl v0.0.5-0.20241028093154-0f94930c27ce/go.mod h1:IyRvgFKOQPC/Qdx543PGl6WgeDOU+hWdv+xLz3stotc=
 github.com/crypto-org-chain/cronos/store v0.0.5-0.20241028093154-0f94930c27ce h1:g6ltW2J6W10pp8poYCfjUwVkzHy2izh7/71EvUXRgjM=
diff --git a/gomod2nix.toml b/gomod2nix.toml
index 5da82a0cd..ea42b6296 100644
--- a/gomod2nix.toml
+++ b/gomod2nix.toml
@@ -153,9 +153,8 @@ schema = 3
     version = "v1.0.0-beta.5"
     hash = "sha256-Fy/PbsOsd6iq0Njy3DVWK6HqWsogI+MkE8QslHGWyVg="
   [mod."github.com/cosmos/cosmos-sdk"]
-    version = "v0.50.6-0.20250515092613-f67eec43305b"
-    hash = "sha256-l+hjQshLCgptTxAxZWXAN6lZ02mjMifEHkaDmElkukg="
-    replaced = "github.com/crypto-org-chain/cosmos-sdk"
+    version = "v0.50.14"
+    hash = "sha256-IChk3/9KRGlUFPRJvA3fFBsGkKDKImE5FSv4jRlJyFg="
   [mod."github.com/cosmos/go-bip39"]
     version = "v1.0.0"
     hash = "sha256-Qm2aC2vaS8tjtMUbHmlBSagOSqbduEEDwc51qvQaBmA="