diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6468d60f..414adc84 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@
 
 references:
 
-  container_config_node14: &container_config_node14
+  container_config_node12: &container_config_node12
     working_directory: ~/project/build
     docker:
       - image: circleci/node:14-browsers
@@ -55,7 +55,7 @@ version: 2
 jobs:
 
   build:
-    <<: *container_config_node14
+    <<: *container_config_node12
     steps:
       - checkout
       - run:
@@ -85,7 +85,7 @@ jobs:
             - build
 
   test:
-    <<: *container_config_node14
+    <<: *container_config_node12
     steps:
       - *attach_workspace
       - run:
@@ -101,7 +101,7 @@ jobs:
           destination: test-results
 
   publish:
-    <<: *container_config_node14
+    <<: *container_config_node12
     steps:
       - *attach_workspace
       - run:
diff --git a/.nvmrc b/.nvmrc
index 8ae33992..48082f72 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-14.11
+12
diff --git a/package.json b/package.json
index d9b879e9..607d3547 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "@financial-times/n-heroku-tools",
   "version": "0.0.0",
   "engines": {
-    "node": "14.x"
+    "node": "12.x"
   },
   "bin": {
     "n-heroku-tools": "./bin/n-heroku-tools.js",