diff --git a/.circleci/config.yml b/.circleci/config.yml
index 23ae5c75..351d3168 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -34,7 +34,7 @@ workflows:
             - build
           matrix:
             parameters:
-              node-version: ["12", "14", "16"]
+              node-version: ["14", "16"]
       - test-chrome:
           requires:
             - build
@@ -120,7 +120,7 @@ jobs:
           name: Install nodejs
           # In the current image, `sudo apt install nodejs` requires `sudo apt update` which is too slow
           command: |
-            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_12.x/pool/main/n/nodejs/nodejs_12.22.1-deb-1nodesource1_amd64.deb
+            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_16.x/pool/main/n/nodejs/nodejs_16.13.2-deb-1nodesource1_amd64.deb
             sudo dpkg -i "$HOME/nodejs.deb"
       - run:
           name: Install yarn
@@ -243,7 +243,6 @@ jobs:
           # In the current image, `sudo apt install nodejs` requires `sudo apt update` which is too slow
           command: |
             declare -A node_links=(
-              ["12"]="https://deb.nodesource.com/node_12.x/pool/main/n/nodejs/nodejs_12.22.1-deb-1nodesource1_amd64.deb"
               ["14"]="https://deb.nodesource.com/node_14.x/pool/main/n/nodejs/nodejs_14.18.0-deb-1nodesource1_amd64.deb"
               ["16"]="https://deb.nodesource.com/node_16.x/pool/main/n/nodejs/nodejs_16.13.2-deb-1nodesource1_amd64.deb"
             )
@@ -365,7 +364,7 @@ jobs:
           name: Install nodejs
           # In the current image, `sudo apt install nodejs` requires `sudo apt update` which is too slow
           command: |
-            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_12.x/pool/main/n/nodejs/nodejs_12.22.1-deb-1nodesource1_amd64.deb
+            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_16.x/pool/main/n/nodejs/nodejs_16.13.2-deb-1nodesource1_amd64.deb
             sudo dpkg -i "$HOME/nodejs.deb"
       - run:
           name: Install yarn
@@ -463,7 +462,7 @@ jobs:
           name: Install nodejs
           # In the current image, `sudo apt install nodejs` requires `sudo apt update` which is too slow
           command: |
-            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_12.x/pool/main/n/nodejs/nodejs_12.22.1-deb-1nodesource1_amd64.deb
+            wget -O "$HOME/nodejs.deb" https://deb.nodesource.com/node_16.x/pool/main/n/nodejs/nodejs_16.13.2-deb-1nodesource1_amd64.deb
             sudo dpkg -i "$HOME/nodejs.deb"
       - run:
           name: Install yarn
diff --git a/CHANGELOG.md b/CHANGELOG.md
index be44bcbc..e2c1d216 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -53,6 +53,7 @@ and this project adheres to
 ### Changed
 
 - all: Upgrade cosmjs-types to 0.5 ([#1131]).
+- all: Drop support for Node.js < 14.
 - @cosmjs/stargate: Change `packetCommitment` parameter `sequence` type from
   `Long` to `number` ([#1168]).
 - @cosmjs/tendermint-rpc: The type of `votingPower` fields was changed from
diff --git a/HACKING.md b/HACKING.md
index 15cfd620..00f15f0c 100644
--- a/HACKING.md
+++ b/HACKING.md
@@ -6,7 +6,7 @@ work on CosmJS, i.e. modify it. It is not intended for users of CosmJS.
 ## Prerequisite
 
 - A UNIX-like development environment
-- Node.js 12+, Docker and yarn
+- Node.js 14+, Docker and yarn
 - `sha256sum`, which you
   [can get on macOS as well](https://unix.stackexchange.com/questions/426837/no-sha256sum-in-macos)
 - `gsed`, which you
diff --git a/README.md b/README.md
index ebeb1e06..6563d5e9 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ optipng docs/cosmjs-tree*.png
 
 Currently the codebase supports the following runtime environments:
 
-1. Node.js 12+
+1. Node.js 14+
 2. Modern browsers (Chromium/Firefox/Safari, no Internet Explorer or
    [Edge Spartan](https://en.wikipedia.org/wiki/Microsoft_Edge#Development))
 3. Browser extensions (Chromium/Firefox)