diff --git a/blueprints/flexi-config/files/config/flexi.js b/blueprints/flexi-config/files/config/flexi.js
index cd94541..b4ded99 100644
--- a/blueprints/flexi-config/files/config/flexi.js
+++ b/blueprints/flexi-config/files/config/flexi.js
@@ -2,6 +2,8 @@
 'use strict';
 
 module.exports = {
+  configVersion: '1.0.0',
+
   // breakpoints, order does not matter, they will be sorted by `begin`
   // `name` is used for layout names and booleans on the device/layout service
   // `prefix` is used for column classes, column attributes, and container breakpoint classes
diff --git a/lib/get-validated-flexi-config.js b/lib/get-validated-flexi-config.js
index 86f51be..eb8d79c 100644
--- a/lib/get-validated-flexi-config.js
+++ b/lib/get-validated-flexi-config.js
@@ -27,6 +27,16 @@ module.exports = function(projectRoot) {
          fs.existsSync(configPath));
 
   let flexiConfig = require(configPath);
+  let actualVersion = flexiConfig.configVersion;
+  let expectedVersion = require(path.join(projectRoot,
+                                          'node_modules',
+                                          '@html-next',
+                                          'flexi-config',
+                                          'blueprints',
+                                          'flexi-config',
+                                          'files',
+                                          'config',
+                                          'flexi.js')).configVersion;
 
   assert('config/flexi.js is defined, but could not be imported', flexiConfig);
   assert('config/flexi.js is defined, but does not contain property [array] breakpoints,'
@@ -35,6 +45,14 @@ module.exports = function(projectRoot) {
   assert('config/flexi.js is defined, but does not contain property [number] columns,'
          + ` consider running ${GENERATE_CONFIG_COMMAND} to see the default config file.`,
          typeof flexiConfig.columns === 'number');
+  assert('config/flexi.js is defined, but does not contain property [string] configVersion,'
+         + ` consider running ${GENERATE_CONFIG_COMMAND} to see the default config file.`,
+         actualVersion);
+  assert(`config/flexi.js version does not match the latest config file. Got '${actualVersion}',`
+         + ` expected '${expectedVersion}'. Consider running ${GENERATE_CONFIG_COMMAND} to see`
+         + ' what your config file is missing, then update the version number to match.',
+         actualVersion === expectedVersion);
 
   return flexiConfig;
 };
+