diff --git a/modules/apps/transfer/module.go b/modules/apps/transfer/module.go
index 0daa6dc3bf0..6a33109d6f1 100644
--- a/modules/apps/transfer/module.go
+++ b/modules/apps/transfer/module.go
@@ -2,9 +2,9 @@ package transfer
 
 import (
 	"context"
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"math/rand"
 
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/codec"
diff --git a/modules/apps/transfer/simulation/genesis.go b/modules/apps/transfer/simulation/genesis.go
index a74277d1671..59ea92d8b24 100644
--- a/modules/apps/transfer/simulation/genesis.go
+++ b/modules/apps/transfer/simulation/genesis.go
@@ -1,9 +1,9 @@
 package simulation
 
 import (
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"math/rand"
 	"strings"
 
 	"github.com/cosmos/cosmos-sdk/types/module"
diff --git a/modules/apps/transfer/simulation/genesis_test.go b/modules/apps/transfer/simulation/genesis_test.go
index c869d1c7b25..dd324776c53 100644
--- a/modules/apps/transfer/simulation/genesis_test.go
+++ b/modules/apps/transfer/simulation/genesis_test.go
@@ -1,8 +1,8 @@
 package simulation_test
 
 import (
+	"crypto/rand"
 	"encoding/json"
-	"math/rand"
 	"testing"
 
 	"github.com/cosmos/cosmos-sdk/codec"
diff --git a/modules/apps/transfer/simulation/params.go b/modules/apps/transfer/simulation/params.go
index c7193b47193..48e1c48cab6 100644
--- a/modules/apps/transfer/simulation/params.go
+++ b/modules/apps/transfer/simulation/params.go
@@ -1,8 +1,8 @@
 package simulation
 
 import (
+	"crypto/rand"
 	"fmt"
-	"math/rand"
 
 	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
 	"github.com/cosmos/cosmos-sdk/x/simulation"
diff --git a/modules/apps/transfer/simulation/params_test.go b/modules/apps/transfer/simulation/params_test.go
index 491fee0d3f3..afca6ddc8e0 100644
--- a/modules/apps/transfer/simulation/params_test.go
+++ b/modules/apps/transfer/simulation/params_test.go
@@ -1,7 +1,7 @@
 package simulation_test
 
 import (
-	"math/rand"
+	"crypto/rand"
 	"testing"
 
 	"github.com/stretchr/testify/require"
diff --git a/modules/core/02-client/keeper/keeper_test.go b/modules/core/02-client/keeper/keeper_test.go
index 56d7bd75952..1de8ad18738 100644
--- a/modules/core/02-client/keeper/keeper_test.go
+++ b/modules/core/02-client/keeper/keeper_test.go
@@ -2,7 +2,7 @@ package keeper_test
 
 import (
 	"context"
-	"math/rand"
+	"crypto/rand"
 	"testing"
 	"time"
 
diff --git a/modules/core/02-client/simulation/genesis.go b/modules/core/02-client/simulation/genesis.go
index ddf592dfad2..e0874f97822 100644
--- a/modules/core/02-client/simulation/genesis.go
+++ b/modules/core/02-client/simulation/genesis.go
@@ -1,7 +1,7 @@
 package simulation
 
 import (
-	"math/rand"
+	"crypto/rand"
 
 	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
 
diff --git a/modules/core/03-connection/simulation/genesis.go b/modules/core/03-connection/simulation/genesis.go
index 746daec042f..56a28cd84e8 100644
--- a/modules/core/03-connection/simulation/genesis.go
+++ b/modules/core/03-connection/simulation/genesis.go
@@ -1,7 +1,7 @@
 package simulation
 
 import (
-	"math/rand"
+	"crypto/rand"
 
 	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
 
diff --git a/modules/core/04-channel/simulation/genesis.go b/modules/core/04-channel/simulation/genesis.go
index 7c11dd6cb55..fb84d33a2b0 100644
--- a/modules/core/04-channel/simulation/genesis.go
+++ b/modules/core/04-channel/simulation/genesis.go
@@ -1,7 +1,7 @@
 package simulation
 
 import (
-	"math/rand"
+	"crypto/rand"
 
 	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
 
diff --git a/modules/core/module.go b/modules/core/module.go
index 0cca3e37f1e..a4dad071dce 100644
--- a/modules/core/module.go
+++ b/modules/core/module.go
@@ -2,9 +2,9 @@ package ibc
 
 import (
 	"context"
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"math/rand"
 
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/codec"
diff --git a/modules/core/simulation/genesis.go b/modules/core/simulation/genesis.go
index e6decacb26b..286024b6aaa 100644
--- a/modules/core/simulation/genesis.go
+++ b/modules/core/simulation/genesis.go
@@ -3,9 +3,9 @@ package simulation
 // DONTCOVER
 
 import (
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"math/rand"
 
 	"github.com/cosmos/cosmos-sdk/types/module"
 
diff --git a/modules/core/simulation/genesis_test.go b/modules/core/simulation/genesis_test.go
index 6010f74c20f..3d28c2f0c51 100644
--- a/modules/core/simulation/genesis_test.go
+++ b/modules/core/simulation/genesis_test.go
@@ -1,8 +1,8 @@
 package simulation_test
 
 import (
+	"crypto/rand"
 	"encoding/json"
-	"math/rand"
 	"testing"
 
 	"github.com/cosmos/cosmos-sdk/codec"
diff --git a/testing/simapp/helpers/test_helpers.go b/testing/simapp/helpers/test_helpers.go
index 9ccecbd976c..f70cef0596a 100644
--- a/testing/simapp/helpers/test_helpers.go
+++ b/testing/simapp/helpers/test_helpers.go
@@ -1,7 +1,7 @@
 package helpers
 
 import (
-	"math/rand"
+	"crypto/rand"
 	"time"
 
 	"github.com/cosmos/cosmos-sdk/client"
diff --git a/testing/simapp/sim_test.go b/testing/simapp/sim_test.go
index 53263b3794a..695c4087b45 100644
--- a/testing/simapp/sim_test.go
+++ b/testing/simapp/sim_test.go
@@ -1,9 +1,9 @@
 package simapp
 
 import (
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
-	"math/rand"
 	"os"
 	"testing"
 
diff --git a/testing/simapp/state.go b/testing/simapp/state.go
index 86f20e2b115..ed8bc6bda13 100644
--- a/testing/simapp/state.go
+++ b/testing/simapp/state.go
@@ -1,11 +1,11 @@
 package simapp
 
 import (
+	"crypto/rand"
 	"encoding/json"
 	"fmt"
 	"io"
 	"io/ioutil"
-	"math/rand"
 	"time"
 
 	"github.com/cosmos/cosmos-sdk/codec"