Index: node_modules/autoprefixer/lib/hacks/align-items.js
===================================================================
--- node_modules/autoprefixer/lib/hacks/align-items.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/autoprefixer/lib/hacks/align-items.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,46 @@
+let Declaration = require('../declaration')
+let flexSpec = require('./flex-spec')
+
+class AlignItems extends Declaration {
+  /**
+   * Return property name by final spec
+   */
+  normalize() {
+    return 'align-items'
+  }
+
+  /**
+   * Change property name for 2009 and 2012 specs
+   */
+  prefixed(prop, prefix) {
+    let spec
+    ;[spec, prefix] = flexSpec(prefix)
+    if (spec === 2009) {
+      return prefix + 'box-align'
+    }
+    if (spec === 2012) {
+      return prefix + 'flex-align'
+    }
+    return super.prefixed(prop, prefix)
+  }
+
+  /**
+   * Change value for 2009 and 2012 specs
+   */
+  set(decl, prefix) {
+    let spec = flexSpec(prefix)[0]
+    if (spec === 2009 || spec === 2012) {
+      decl.value = AlignItems.oldValues[decl.value] || decl.value
+    }
+    return super.set(decl, prefix)
+  }
+}
+
+AlignItems.names = ['align-items', 'flex-align', 'box-align']
+
+AlignItems.oldValues = {
+  'flex-end': 'end',
+  'flex-start': 'start'
+}
+
+module.exports = AlignItems