diff --git a/config/config.go b/config/config.go
index d414d0560..3e4bf9340 100644
--- a/config/config.go
+++ b/config/config.go
@@ -2,6 +2,7 @@ package config
 
 import (
 	"fmt"
+	"net/http"
 	"os"
 	"path/filepath"
 	"time"
@@ -385,7 +386,7 @@ func DefaultRPCConfig() *RPCConfig {
 	return &RPCConfig{
 		ListenAddress:          "tcp://127.0.0.1:26657",
 		CORSAllowedOrigins:     []string{},
-		CORSAllowedMethods:     []string{"HEAD", "GET", "POST"},
+		CORSAllowedMethods:     []string{http.MethodHead, http.MethodGet, http.MethodPost},
 		CORSAllowedHeaders:     []string{"Origin", "Accept", "Content-Type", "X-Requested-With", "X-Server-Time"},
 		GRPCListenAddress:      "",
 		GRPCMaxOpenConnections: 900,
diff --git a/go.mod b/go.mod
index 8a6aa8a77..2f9a6ca62 100644
--- a/go.mod
+++ b/go.mod
@@ -11,7 +11,7 @@ require (
 	github.com/go-kit/kit v0.6.0
 	github.com/go-logfmt/logfmt v0.3.0
 	github.com/go-stack/stack v1.8.0 // indirect
-	github.com/gogo/protobuf v1.2.1
+	github.com/gogo/protobuf v1.3.0
 	github.com/golang/protobuf v1.3.2
 	github.com/google/gofuzz v1.0.0 // indirect
 	github.com/gorilla/websocket v1.2.0
diff --git a/go.sum b/go.sum
index 172bec330..5d60415cb 100644
--- a/go.sum
+++ b/go.sum
@@ -35,6 +35,8 @@ github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/gogo/protobuf v1.3.0 h1:G8O7TerXerS4F6sx9OV7/nRfJdnXgHZu/S/7F2SN+UE=
+github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
@@ -59,6 +61,7 @@ github.com/jmhodges/levigo v1.0.0 h1:q5EC36kV79HWeTBWsod3mG11EgStG3qArTKcvlksN1U
 github.com/jmhodges/levigo v1.0.0/go.mod h1:Q6Qx+uH3RAqyK4rFQroq9RL7mdkABMcfhEI+nNuzMJQ=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
+github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515 h1:T+h1c/A9Gawja4Y9mFVWj2vyii2bbUNDw3kt9VxK2EY=
@@ -140,6 +143,7 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
diff --git a/scripts/get_tools.sh b/scripts/get_tools.sh
index 4dfb454bd..2adc782b8 100755
--- a/scripts/get_tools.sh
+++ b/scripts/get_tools.sh
@@ -49,19 +49,25 @@ installFromGithub() {
 }
 
 ######################## DEVELOPER TOOLS #####################################
-installFromGithub gogo/protobuf 61dbc136cf5d2f08d68a011382652244990a53a9 protoc-gen-gogo
+## protobuf v1.3.0
+installFromGithub gogo/protobuf 0ca988a254f991240804bf9821f3450d87ccbb1b protoc-gen-gogo
 
-installFromGithub square/certstrap e27060a3643e814151e65b9807b6b06d169580a7
+installFromGithub square/certstrap 338204a88c4349b1c135eac1e8c14c693ad007da
 
 # used to build tm-monitor & tm-bench binaries
-installFromGithub mitchellh/gox 51ed453898ca5579fea9ad1f08dff6b121d9f2e8
+## gox v1.0.1
+installFromGithub mitchellh/gox d8caaff5a9dc98f4cfa1fcce6e7265a04689f641
 
-## golangci-lint v1.13.2
-installFromGithub golangci/golangci-lint 7b2421d55194c9dc385eff7720a037aa9244ca3c cmd/golangci-lint
+## Trying to install golangci with Go 1.13 gives:
+## go: github.com/go-critic/go-critic@v0.0.0-20181204210945-1df300866540: invalid pseudo-version: does not match version-control timestamp (2019-05-26T07:48:19Z)
+## golangci-lint v1.17.1
+# installFromGithub golangci/golangci-lint 4ba2155996359eabd8800d1fbf3e3a9777c80490 cmd/golangci-lint
 
+## Trying to install golangci with Go 1.13 gives:
+## go: cannot find main module, but found .git/config in /go/src/github.com/petermattis/goid
 ## make test_with_deadlock
 ## XXX: https://github.com/tendermint/tendermint/issues/3242
-installFromGithub petermattis/goid b0b1615b78e5ee59739545bb38426383b2cda4c9
-installFromGithub sasha-s/go-deadlock d68e2bc52ae3291765881b9056f2c1527f245f1e
-go get golang.org/x/tools/cmd/goimports
-installFromGithub snikch/goodman 10e37e294daa3c9a90abded60ff9924bafab3888 cmd/goodman
+# installFromGithub petermattis/goid b0b1615b78e5ee59739545bb38426383b2cda4c9
+# installFromGithub sasha-s/go-deadlock d68e2bc52ae3291765881b9056f2c1527f245f1e
+# go get golang.org/x/tools/cmd/goimports
+# installFromGithub snikch/goodman 10e37e294daa3c9a90abded60ff9924bafab3888 cmd/goodman