diff --git a/CHANGELOG_UNRELEASED.md b/CHANGELOG_UNRELEASED.md
index 368f6a9620..753ce80cb1 100644
--- a/CHANGELOG_UNRELEASED.md
+++ b/CHANGELOG_UNRELEASED.md
@@ -12,6 +12,7 @@
 
 ### Chain (Non-consensus)
 
+- (impv) [\#3195](https://github.com/bandprotocol/bandchain/pull/3195) Patch go owasm
 - (impv) [\#2912](https://github.com/bandprotocol/bandchain/pull/2912) proof contain the real block time instead of time hash
 
 ### Yoda
@@ -34,7 +35,7 @@
 - (bugs) [\#2927](https://github.com/bandprotocol/bandchain/pull/2927) Fix default tab on Route's search
 - (feat) [\#2854](https://github.com/bandprotocol/bandchain/pull/2854) Implement reinvest
 - (chore) [\#2793](https://github.com/bandprotocol/bandchain/pull/2793) Remove legacy row and column
-- (impv) [\#2686](https://github.com/bandprotocol/bandchain/pull/2686) Support array on generateDecodeLibSolidity 
+- (impv) [\#2686](https://github.com/bandprotocol/bandchain/pull/2686) Support array on generateDecodeLibSolidity
 
 ### Bridges
 
diff --git a/chain/app/app.go b/chain/app/app.go
index 573f58ddfb..c9b245b408 100644
--- a/chain/app/app.go
+++ b/chain/app/app.go
@@ -37,6 +37,7 @@ import (
 	"github.com/bandprotocol/bandchain/chain/x/oracle"
 	bandante "github.com/bandprotocol/bandchain/chain/x/oracle/ante"
 	bandsupply "github.com/bandprotocol/bandchain/chain/x/supply"
+	"github.com/bandprotocol/go-owasm/api"
 )
 
 const (
@@ -138,7 +139,7 @@ func SetBech32AddressPrefixesAndBip44CoinType(config *sdk.Config) {
 func NewBandApp(
 	logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool,
 	invCheckPeriod uint, skipUpgradeHeights map[int64]bool, home string,
-	disableFeelessReports bool, baseAppOptions ...func(*bam.BaseApp),
+	disableFeelessReports bool, owasmCacheSize uint32, baseAppOptions ...func(*bam.BaseApp),
 ) *BandApp {
 	cdc := MakeCodec()
 	bApp := bam.NewBaseApp(AppName, logger, db, auth.DefaultTxDecoder(cdc), baseAppOptions...)
@@ -157,6 +158,10 @@ func NewBandApp(
 		keys:           keys,
 		tKeys:          tKeys,
 	}
+	owasmVM, err := api.NewVm(owasmCacheSize)
+	if err != nil {
+		panic(err)
+	}
 	// Initialize params keeper and module subspaces.
 	app.ParamsKeeper = params.NewKeeper(cdc, keys[params.StoreKey], tKeys[params.TStoreKey])
 	authSubspace := app.ParamsKeeper.Subspace(auth.DefaultParamspace)
@@ -183,7 +188,7 @@ func NewBandApp(
 	app.CrisisKeeper = crisis.NewKeeper(crisisSubspace, invCheckPeriod, app.SupplyKeeper, auth.FeeCollectorName)
 	app.SlashingKeeper = slashing.NewKeeper(cdc, keys[slashing.StoreKey], &stakingKeeper, slashingSubspace)
 	app.UpgradeKeeper = upgrade.NewKeeper(skipUpgradeHeights, keys[upgrade.StoreKey], cdc)
-	app.OracleKeeper = oracle.NewKeeper(cdc, keys[oracle.StoreKey], filepath.Join(viper.GetString(cli.HomeFlag), "files"), auth.FeeCollectorName, oracleSubspace, app.SupplyKeeper, &stakingKeeper, app.DistrKeeper)
+	app.OracleKeeper = oracle.NewKeeper(cdc, keys[oracle.StoreKey], filepath.Join(viper.GetString(cli.HomeFlag), "files"), auth.FeeCollectorName, oracleSubspace, app.SupplyKeeper, &stakingKeeper, app.DistrKeeper, owasmVM)
 	// Register the proposal types.
 	govRouter := gov.NewRouter()
 	govRouter.
diff --git a/chain/cmd/bandd/genos.go b/chain/cmd/bandd/genos.go
index ac30094b6b..a611129783 100644
--- a/chain/cmd/bandd/genos.go
+++ b/chain/cmd/bandd/genos.go
@@ -16,7 +16,7 @@ import (
 	"github.com/bandprotocol/bandchain/chain/pkg/filecache"
 	"github.com/bandprotocol/bandchain/chain/x/oracle"
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
-	"github.com/bandprotocol/bandchain/go-owasm/api"
+	"github.com/bandprotocol/go-owasm/api"
 )
 
 // AddGenesisOracleScriptCmd returns add-oracle-script cobra Command.
@@ -33,7 +33,11 @@ func AddGenesisOracleScriptCmd(ctx *server.Context, cdc *codec.Codec, defaultNod
 			if err != nil {
 				return err
 			}
-			compiledData, err := api.Compile(data, types.MaxCompiledWasmCodeSize)
+			vm, err := api.NewVm(0) // The compilation doesn't use cache
+			if err != nil {
+				return err
+			}
+			compiledData, err := vm.Compile(data, types.MaxCompiledWasmCodeSize)
 			if err != nil {
 				return err
 			}
diff --git a/chain/cmd/bandd/main.go b/chain/cmd/bandd/main.go
index 4f2e74b164..91bb71c3dc 100644
--- a/chain/cmd/bandd/main.go
+++ b/chain/cmd/bandd/main.go
@@ -38,6 +38,7 @@ const (
 	flagEnableFastSync        = "enable-fast-sync"
 	flagWithPricer            = "with-pricer"
 	flagWithRequestSearch     = "with-request-search"
+	flagWithOwasmCacheSize    = "oracle-script-cache-size"
 )
 
 var invCheckPeriod uint
@@ -74,6 +75,7 @@ func main() {
 	rootCmd.PersistentFlags().Bool(flagEnableFastSync, false, "[Experimental] Enable fast sync mode")
 	rootCmd.PersistentFlags().String(flagWithRequestSearch, "", "[Experimental] Enable mode to save request in sql database")
 	rootCmd.PersistentFlags().String(flagWithPricer, "", "[Experimental] Enable mode to save price in level db")
+	rootCmd.PersistentFlags().Uint(flagWithOwasmCacheSize, 100, "[Experimental] Number of oracle scripts to cache")
 	err := executor.Execute()
 	if err != nil {
 		panic(err)
@@ -100,6 +102,7 @@ func newApp(logger log.Logger, db dbm.DB, traceStore io.Writer) abci.Application
 		logger, db, traceStore, true, invCheckPeriod, skipUpgradeHeights,
 		viper.GetString(flags.FlagHome),
 		viper.GetBool(flagDisableFeelessReports),
+		viper.GetUint32(flagWithOwasmCacheSize),
 		baseapp.SetPruning(pruningOpts),
 		baseapp.SetMinGasPrices(viper.GetString(server.FlagMinGasPrices)),
 		baseapp.SetHaltHeight(viper.GetUint64(server.FlagHaltHeight)),
@@ -139,7 +142,7 @@ func exportAppStateAndTMValidators(
 ) (json.RawMessage, []tmtypes.GenesisValidator, error) {
 
 	if height != -1 {
-		bandApp := app.NewBandApp(logger, db, traceStore, false, uint(1), map[int64]bool{}, "", viper.GetBool(flagDisableFeelessReports))
+		bandApp := app.NewBandApp(logger, db, traceStore, false, uint(1), map[int64]bool{}, "", viper.GetBool(flagDisableFeelessReports), viper.GetUint32(flagWithOwasmCacheSize))
 		err := bandApp.LoadHeight(height)
 		if err != nil {
 			return nil, nil, err
@@ -148,6 +151,6 @@ func exportAppStateAndTMValidators(
 		return bandApp.ExportAppStateAndValidators(forZeroHeight, jailWhiteList)
 	}
 
-	bandApp := app.NewBandApp(logger, db, traceStore, true, uint(1), map[int64]bool{}, "", viper.GetBool(flagDisableFeelessReports))
+	bandApp := app.NewBandApp(logger, db, traceStore, true, uint(1), map[int64]bool{}, "", viper.GetBool(flagDisableFeelessReports), viper.GetUint32(flagWithOwasmCacheSize))
 	return bandApp.ExportAppStateAndValidators(forZeroHeight, jailWhiteList)
 }
diff --git a/chain/go.mod b/chain/go.mod
index 2a76d94729..c0be7f2fb2 100644
--- a/chain/go.mod
+++ b/chain/go.mod
@@ -3,7 +3,7 @@ module github.com/bandprotocol/bandchain/chain
 go 1.13
 
 require (
-	github.com/bandprotocol/bandchain/go-owasm v0.0.0-00010101000000-000000000000
+	github.com/bandprotocol/go-owasm v0.0.0-20210311072328-a6859c27139c
 	github.com/cosmos/cosmos-sdk v0.39.2
 	github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d
 	github.com/ethereum/go-ethereum v1.9.19
@@ -38,5 +38,3 @@ require (
 )
 
 replace github.com/gogo/protobuf => github.com/regen-network/protobuf v1.3.2-alpha.regen.1
-
-replace github.com/bandprotocol/bandchain/go-owasm => ../go-owasm
diff --git a/chain/go.sum b/chain/go.sum
index 969b1df830..00d7cf6573 100644
--- a/chain/go.sum
+++ b/chain/go.sum
@@ -64,6 +64,8 @@ github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQ
 github.com/aws/aws-sdk-go v1.25.48/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
+github.com/bandprotocol/go-owasm v0.0.0-20210311072328-a6859c27139c h1:G0NLmoFYgPJqH9M2HLkGHayY9euzrEdOOt30/Pqbfqo=
+github.com/bandprotocol/go-owasm v0.0.0-20210311072328-a6859c27139c/go.mod h1:buKhSOd32eN0zPbZ/k+4sa6znl33cDg+8JnORQD3/c8=
 github.com/bartekn/go-bip39 v0.0.0-20171116152956-a05967ea095d h1:1aAija9gr0Hyv4KfQcRcwlmFIrhkDmIj2dz5bkg/s/8=
 github.com/bartekn/go-bip39 v0.0.0-20171116152956-a05967ea095d/go.mod h1:icNx/6QdFblhsEjZehARqbNumymUT/ydwlLojFdv7Sk=
 github.com/benbjohnson/clock v1.0.2/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
@@ -669,7 +671,6 @@ github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5Fsn
 github.com/prometheus/client_golang v1.3.0/go.mod h1:hJaj2vgQTGQmVCsAACORcieXFeDPbaTKGT+JTgUa3og=
 github.com/prometheus/client_golang v1.5.1 h1:bdHYieyGlH+6OLEk2YQha8THib30KP0/yD0YH9m6xcA=
 github.com/prometheus/client_golang v1.5.1/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
-github.com/prometheus/client_golang v1.8.0 h1:zvJNkoCFAnYFNC24FV8nW4JdRJ3GIFcLbg65lL/JDcw=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190115171406-56726106282f/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
diff --git a/chain/x/oracle/keeper/keeper.go b/chain/x/oracle/keeper/keeper.go
index bf136e380c..dce3546379 100644
--- a/chain/x/oracle/keeper/keeper.go
+++ b/chain/x/oracle/keeper/keeper.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/bandprotocol/bandchain/chain/pkg/filecache"
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
+	owasm "github.com/bandprotocol/go-owasm/api"
 )
 
 const (
@@ -25,6 +26,7 @@ type Keeper struct {
 	supplyKeeper     types.SupplyKeeper
 	stakingKeeper    types.StakingKeeper
 	distrKeeper      types.DistrKeeper
+	owasmVM          *owasm.Vm
 }
 
 // NewKeeper creates a new oracle Keeper instance.
@@ -32,6 +34,7 @@ func NewKeeper(
 	cdc *codec.Codec, key sdk.StoreKey, fileDir string, feeCollectorName string,
 	paramSpace params.Subspace, supplyKeeper types.SupplyKeeper,
 	stakingKeeper types.StakingKeeper, distrKeeper types.DistrKeeper,
+	owasmVM *owasm.Vm,
 ) Keeper {
 	if !paramSpace.HasKeyTable() {
 		paramSpace = paramSpace.WithKeyTable(ParamKeyTable())
@@ -45,6 +48,7 @@ func NewKeeper(
 		supplyKeeper:     supplyKeeper,
 		stakingKeeper:    stakingKeeper,
 		distrKeeper:      distrKeeper,
+		owasmVM:          owasmVM,
 	}
 }
 
diff --git a/chain/x/oracle/keeper/oracle_script.go b/chain/x/oracle/keeper/oracle_script.go
index c61654cb60..7702a135b3 100644
--- a/chain/x/oracle/keeper/oracle_script.go
+++ b/chain/x/oracle/keeper/oracle_script.go
@@ -7,7 +7,6 @@ import (
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
-	"github.com/bandprotocol/bandchain/go-owasm/api"
 )
 
 // HasOracleScript checks if the oracle script of this ID exists in the storage.
@@ -79,7 +78,7 @@ func (k Keeper) AddOracleScriptFile(file []byte) (string, error) {
 	if bytes.Equal(file, types.DoNotModifyBytes) {
 		return types.DoNotModify, nil
 	}
-	compiledFile, err := api.Compile(file, types.MaxCompiledWasmCodeSize)
+	compiledFile, err := k.owasmVM.Compile(file, types.MaxCompiledWasmCodeSize)
 	if err != nil {
 		return "", sdkerrors.Wrapf(types.ErrOwasmCompilation, "with error: %s", err.Error())
 	}
diff --git a/chain/x/oracle/keeper/oracle_script_test.go b/chain/x/oracle/keeper/oracle_script_test.go
index abb55acd61..1d8b104b37 100644
--- a/chain/x/oracle/keeper/oracle_script_test.go
+++ b/chain/x/oracle/keeper/oracle_script_test.go
@@ -7,7 +7,6 @@ import (
 
 	"github.com/bandprotocol/bandchain/chain/x/oracle/testapp"
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
-	"github.com/bandprotocol/bandchain/go-owasm/api"
 )
 
 func TestHasOracleScript(t *testing.T) {
@@ -141,7 +140,7 @@ func TestGetAllOracleScripts(t *testing.T) {
 func TestAddOracleScriptFile(t *testing.T) {
 	_, _, k := testapp.CreateTestInput(true)
 	// Code should be perferctly compilable.
-	compiledCode, err := api.Compile(testapp.WasmExtra1, types.MaxCompiledWasmCodeSize)
+	compiledCode, err := testapp.OwasmVM.Compile(testapp.WasmExtra1, types.MaxCompiledWasmCodeSize)
 	require.NoError(t, err)
 	// We start by adding the Owasm content to the storage.
 	filename, err := k.AddOracleScriptFile(testapp.WasmExtra1)
diff --git a/chain/x/oracle/keeper/owasm.go b/chain/x/oracle/keeper/owasm.go
index 5e56b655d8..56505341d2 100644
--- a/chain/x/oracle/keeper/owasm.go
+++ b/chain/x/oracle/keeper/owasm.go
@@ -10,7 +10,6 @@ import (
 
 	"github.com/bandprotocol/bandchain/chain/pkg/bandrng"
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
-	owasm "github.com/bandprotocol/bandchain/go-owasm/api"
 )
 
 // GetRandomValidators returns a pseudorandom subset of active validators. Each validator has
@@ -70,7 +69,7 @@ func (k Keeper) PrepareRequest(ctx sdk.Context, r types.RequestSpec) error {
 		return err
 	}
 	code := k.GetFile(script.Filename)
-	output, err := owasm.Prepare(code, types.WasmPrepareGas, types.MaxDataSize, env)
+	output, err := k.owasmVM.Prepare(code, types.WasmPrepareGas, types.MaxDataSize, env)
 	if err != nil {
 		return sdkerrors.Wrapf(types.ErrBadWasmExecution, err.Error())
 	}
@@ -120,7 +119,7 @@ func (k Keeper) ResolveRequest(ctx sdk.Context, reqID types.RequestID) {
 	env := types.NewExecuteEnv(req, k.GetReports(ctx, reqID))
 	script := k.MustGetOracleScript(ctx, req.OracleScriptID)
 	code := k.GetFile(script.Filename)
-	output, err := owasm.Execute(code, types.WasmExecuteGas, types.MaxDataSize, env)
+	output, err := k.owasmVM.Execute(code, types.WasmExecuteGas, types.MaxDataSize, env)
 	if err != nil {
 		k.ResolveFailure(ctx, reqID, err.Error())
 	} else if env.Retdata == nil {
diff --git a/chain/x/oracle/testapp/setup.go b/chain/x/oracle/testapp/setup.go
index 80d9fbdd86..d455ccfc1e 100644
--- a/chain/x/oracle/testapp/setup.go
+++ b/chain/x/oracle/testapp/setup.go
@@ -27,6 +27,7 @@ import (
 	"github.com/bandprotocol/bandchain/chain/x/oracle"
 	me "github.com/bandprotocol/bandchain/chain/x/oracle/keeper"
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
+	owasm "github.com/bandprotocol/go-owasm/api"
 )
 
 // Account is a data structure to store key of test account.
@@ -48,6 +49,7 @@ var (
 	Validator3    Account
 	DataSources   []types.DataSource
 	OracleScripts []types.OracleScript
+	OwasmVM       *owasm.Vm
 )
 
 // nolint
@@ -67,6 +69,11 @@ func init() {
 	Validator1 = createArbitraryAccount(r)
 	Validator2 = createArbitraryAccount(r)
 	Validator3 = createArbitraryAccount(r)
+	owasmVM, err := owasm.NewVm(10)
+	if err != nil {
+		panic(err)
+	}
+	OwasmVM = owasmVM
 }
 
 func createArbitraryAccount(r *rand.Rand) Account {
@@ -147,7 +154,7 @@ func NewSimApp(chainID string, logger log.Logger) *bandapp.BandApp {
 	}
 	viper.Set(cli.HomeFlag, dir)
 	db := dbm.NewMemDB()
-	app := bandapp.NewBandApp(logger, db, nil, true, 0, map[int64]bool{}, "", false)
+	app := bandapp.NewBandApp(logger, db, nil, true, 0, map[int64]bool{}, "", false, 0)
 	genesis := bandapp.NewDefaultGenesisState()
 	// Fund seed accounts and validators with 1000000uband and 100000000uband initially.
 	authGenesis := auth.NewGenesisState(auth.DefaultParams(), []authexported.GenesisAccount{
diff --git a/chain/x/oracle/testapp/wasm_util.go b/chain/x/oracle/testapp/wasm_util.go
index 17a6effd9d..e81d66d24c 100644
--- a/chain/x/oracle/testapp/wasm_util.go
+++ b/chain/x/oracle/testapp/wasm_util.go
@@ -6,11 +6,10 @@ import (
 	"os/exec"
 
 	"github.com/bandprotocol/bandchain/chain/x/oracle/types"
-	"github.com/bandprotocol/bandchain/go-owasm/api"
 )
 
 func compile(code []byte) []byte {
-	compiled, err := api.Compile(code, types.MaxCompiledWasmCodeSize)
+	compiled, err := OwasmVM.Compile(code, types.MaxCompiledWasmCodeSize)
 	if err != nil {
 		panic(err)
 	}
diff --git a/chain/x/oracle/types/exec_env.go b/chain/x/oracle/types/exec_env.go
index de9a2a9e80..58db221209 100644
--- a/chain/x/oracle/types/exec_env.go
+++ b/chain/x/oracle/types/exec_env.go
@@ -1,7 +1,7 @@
 package types
 
 import (
-	"github.com/bandprotocol/bandchain/go-owasm/api"
+	"github.com/bandprotocol/go-owasm/api"
 )
 
 // BaseEnv combines shared functions used in prepare and execution Owasm program,
diff --git a/chain/x/oracle/types/exec_env_test.go b/chain/x/oracle/types/exec_env_test.go
index e150626d99..0a86d882f8 100644
--- a/chain/x/oracle/types/exec_env_test.go
+++ b/chain/x/oracle/types/exec_env_test.go
@@ -8,7 +8,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/tendermint/tendermint/crypto/secp256k1"
 
-	"github.com/bandprotocol/bandchain/go-owasm/api"
+	"github.com/bandprotocol/go-owasm/api"
 )
 
 var (