diff --git a/CHANGELOG.md b/CHANGELOG.md
index ebc769ee0..fd805eb87 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.15.2
+
+IMPROVEMENT
+
+- [cmd] `--show_validator` flag now returns hex public key of a validator
+- [tendermint] Update to [v0.31.1](https://github.com/tendermint/tendermint/blob/master/CHANGELOG.md#v0311) 
+
 ## 0.15.1
 
 IMPROVEMENT
diff --git a/Gopkg.lock b/Gopkg.lock
index 5c56e5161..858de8056 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -383,7 +383,7 @@
   version = "v0.14.1"
 
 [[projects]]
-  digest = "1:76fbe1f3b51f6bd7014bbf9c6c4427180be62b1715278993e9235d7d4552629f"
+  digest = "1:c9856690720d5c24530ab1e2768dd4c80f6f21e34d16464f6906a70921a40254"
   name = "github.com/tendermint/tendermint"
   packages = [
     "abci/client",
@@ -439,8 +439,8 @@
     "version",
   ]
   pruneopts = "UT"
-  revision = "0d985ede28bd6937fa9d3613618e42cab6fc871c"
-  version = "v0.31.0"
+  revision = "a0234affb6959a0aec285eebf3a3963251d2d186"
+  version = "v0.31.1"
 
 [[projects]]
   digest = "1:b6621a5e9003d7d809993d49217a841d27ef85b4bc0459115d3fd1f8c1518999"
diff --git a/Gopkg.toml b/Gopkg.toml
index d3d1a0438..628fe9051 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -16,7 +16,7 @@
 
 [[constraint]]
   name = "github.com/tendermint/tendermint"
-  version = "0.31.0"
+  version = "0.31.1"
 
 [[constraint]]
   name = "github.com/MinterTeam/go-amino"
diff --git a/cmd/minter/main.go b/cmd/minter/main.go
index 9e886657d..8ca836fbe 100644
--- a/cmd/minter/main.go
+++ b/cmd/minter/main.go
@@ -9,7 +9,6 @@ import (
 	"github.com/MinterTeam/minter-go-node/genesis"
 	"github.com/MinterTeam/minter-go-node/gui"
 	"github.com/MinterTeam/minter-go-node/log"
-	"github.com/pkg/errors"
 	"github.com/tendermint/go-amino"
 	"github.com/tendermint/tendermint/abci/types"
 	bc "github.com/tendermint/tendermint/blockchain"
@@ -166,10 +165,5 @@ func showValidator() {
 	}
 
 	pv := privval.LoadFilePV(keyFilePath, cfg.PrivValidatorStateFile())
-	bz, err := cdc.MarshalJSON(pv.GetPubKey())
-	if err != nil {
-		panic(errors.Wrap(err, "failed to marshal private validator pubkey"))
-	}
-
-	fmt.Println(string(bz))
+	fmt.Printf("Mp%x", pv.GetPubKey().Bytes()[5:])
 }
diff --git a/version/version.go b/version/version.go
index c0d2ed927..1d4d12c3a 100755
--- a/version/version.go
+++ b/version/version.go
@@ -4,14 +4,14 @@ package version
 const (
 	Maj = "0"
 	Min = "15"
-	Fix = "1"
+	Fix = "2"
 
 	AppVer = 2
 )
 
 var (
 	// Must be a string because scripts like dist.sh read this file.
-	Version = "0.15.1"
+	Version = "0.15.2"
 
 	// GitCommit is the current HEAD set using ldflags.
 	GitCommit string