diff --git a/.circleci/config.yml b/.circleci/config.yml
index e4afa15f08..99a971e4b5 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 defaults: &linux_defaults
   working_directory: /go/src/github.com/cosmos/cosmos-sdk
   docker:
-    - image: circleci/golang:1.12.1
+    - image: circleci/golang:1.12.4
   environment:
     GOBIN: /tmp/workspace/bin
 
@@ -17,7 +17,7 @@ macos_config: &macos_defaults
     xcode: "10.1.0"
   working_directory: /Users/distiller/project/src/github.com/cosmos/cosmos-sdk
   environment:
-    GO_VERSION: "1.12.1"
+    GO_VERSION: "1.12.4"
 
 set_macos_env: &macos_env
   run:
@@ -287,7 +287,7 @@ jobs:
         GOPATH: /home/circleci/.go_workspace/
         GOOS: linux
         GOARCH: amd64
-        GO_VERSION: "1.12.1"
+        GO_VERSION: "1.12.4"
       parallelism: 1
       steps:
         - checkout
diff --git a/.pending/improvements/gaia/4261-Upgrade-toolcha b/.pending/improvements/gaia/4261-Upgrade-toolcha
new file mode 100644
index 0000000000..0ab71d7c0f
--- /dev/null
+++ b/.pending/improvements/gaia/4261-Upgrade-toolcha
@@ -0,0 +1 @@
+#4261 Upgrade toolchain to Go 1.12.4. Docs and instructions amended accordingly.
diff --git a/README.md b/README.md
index fc9f6b7cc5..7146fdb018 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ It is being used to build `Gaia`, the first implementation of the Cosmos Hub.
 **WARNING**: The SDK has mostly stabilized, but we are still making some
 breaking changes.
 
-**Note**: Requires [Go 1.12.1+](https://golang.org/dl/)
+**Note**: Requires [Go 1.12.4+](https://golang.org/dl/)
 
 ## Cosmos Hub Mainnet
 
diff --git a/docs/cosmos-hub/installation.md b/docs/cosmos-hub/installation.md
index 20e5ffa44a..6524513bcb 100644
--- a/docs/cosmos-hub/installation.md
+++ b/docs/cosmos-hub/installation.md
@@ -15,7 +15,7 @@ source ~/.bash_profile
 ```
 
 ::: tip
-**Go 1.12.1+** is required for the Cosmos SDK.
+**Go 1.12.4+** is required for the Cosmos SDK.
 :::
 
 ### Install the binaries
diff --git a/docs/translations/cn/cosmos-hub/installation.md b/docs/translations/cn/cosmos-hub/installation.md
index 6a6214eeba..0085955b6d 100644
--- a/docs/translations/cn/cosmos-hub/installation.md
+++ b/docs/translations/cn/cosmos-hub/installation.md
@@ -16,7 +16,7 @@ source ~/.bash_profile
 ```
 
 ::: 提示
-Cosmos SDK需要安装**Go 1.12.1+**
+Cosmos SDK需要安装**Go 1.12.4+**
 :::
 
 ### 安装二进制执行程序
diff --git a/scripts/install/install_sdk_arm.sh b/scripts/install/install_sdk_arm.sh
index d00f5fe16d..770c4ec982 100644
--- a/scripts/install/install_sdk_arm.sh
+++ b/scripts/install/install_sdk_arm.sh
@@ -4,7 +4,7 @@
 BRANCH=master
 REPO=github.com/cosmos/cosmos-sdk
 
-GO_VERSION=1.12.1
+GO_VERSION=1.12.4
 
 sudo apt-get update -y
 sudo apt-get upgrade -y
diff --git a/scripts/install/install_sdk_bsd.sh b/scripts/install/install_sdk_bsd.sh
index 1db4062511..cd46400d07 100644
--- a/scripts/install/install_sdk_bsd.sh
+++ b/scripts/install/install_sdk_bsd.sh
@@ -16,7 +16,7 @@
 set BRANCH=master
 set REPO=github.com/cosmos/cosmos-sdk
 
-set GO_VERSION=1.12.1
+set GO_VERSION=1.12.4
 
 sudo pkg update
 
diff --git a/scripts/install/install_sdk_ubuntu.sh b/scripts/install/install_sdk_ubuntu.sh
index 2f62fe4156..8e7107df41 100644
--- a/scripts/install/install_sdk_ubuntu.sh
+++ b/scripts/install/install_sdk_ubuntu.sh
@@ -7,7 +7,7 @@
 BRANCH=master
 REPO=github.com/cosmos/cosmos-sdk
 
-GO_VERSION=1.12.1
+GO_VERSION=1.12.4
 
 sudo apt-get update -y
 sudo apt-get upgrade -y