diff --git a/README.md b/README.md
index c4647466c0..ea9d26e432 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Main features:
 * Minimal platform dependencies
 * Combined reference counting and mark-and-sweep garbage collection with finalization
 * Custom features like co-routines
-* Property virtualization using a subset of Ecmascript E6 Proxy object
+* Property virtualization using a subset of Ecmascript E2015 Proxy object
 * Bytecode dump/load for caching compiled functions
 * Distributable includes an optional logging framework, CommonJS-based module
   loading implementations, etc
diff --git a/doc/low-memory.rst b/doc/low-memory.rst
index 8f7e203be7..8d3ad18c31 100644
--- a/doc/low-memory.rst
+++ b/doc/low-memory.rst
@@ -217,7 +217,7 @@ NOTE: This list is not exhaustive, see ``config/examples/low_memory.yaml``.
 
   - ``#undef DUK_USE_JC``
 
-* Features borrowed from Ecmascript E6 can usually be disabled
+* Features borrowed from Ecmascript ES2015 can usually be disabled
   (not exhaustive):
 
   - ``#undef DUK_USE_ES6_OBJECT_SETPROTOTYPEOF``
diff --git a/website/guide/luacomparison.html b/website/guide/luacomparison.html
index 389d53abc2..29e13bd0ed 100644
--- a/website/guide/luacomparison.html
+++ b/website/guide/luacomparison.html
@@ -76,7 +76,7 @@ <h2>Bytecode dump/load</h2>
 <h2>Metatables</h2>
 
 <p>There is no equivalent of Lua metatables in Ecmascript E5/E5.1, but
-<a href="http://www.ecma-international.org/ecma-262/6.0/index.html#sec-proxy-objects">Ecmascript E6 Proxy objects</a>
+<a href="http://www.ecma-international.org/ecma-262/6.0/index.html#sec-proxy-objects">Ecmascript ES2015 Proxy objects</a>
 provide similar functionality.  To allow property virtualization better than available in
 E5/E5.1, Duktape implements an <a href="#es6-proxy">ES2015 Proxy subset</a>.</p>
 
@@ -105,7 +105,7 @@ <h2>Coroutines</h2>
 <h2>Multiple return values</h2>
 
 <p>Lua supports multiple return values, Duktape (or Ecmascript) currently
-doesn't.  This may change with Ecmascript E6, which has a syntax for
+doesn't.  This may change with Ecmascript ES2015, which has a syntax for
 multiple value returns.  The Duktape/C API reserves return values above 1
 so that they may be later used for multiple return values.</p>
 
diff --git a/website/index/index.html b/website/index/index.html
index dacb25ce7e..d074d991b9 100644
--- a/website/index/index.html
+++ b/website/index/index.html
@@ -55,7 +55,7 @@ <h1>Main features</h1>
 <li>Combined reference counting and mark-and-sweep garbage collection
     with finalization</li>
 <li>Coroutines</li>
-<li>Property virtualization using a subset of Ecmascript E6 Proxy object</li>
+<li>Property virtualization using a subset of Ecmascript ES2015 Proxy object</li>
 <li>Bytecode dump/load for caching compiled functions</li>
 <li>Distributable includes an optional logging framework, CommonJS-based module
     loading implementations, etc</li>