diff --git a/elixir-1.6.4.tar.gz b/elixir-1.6.4.tar.gz
deleted file mode 100644
index 3338fc6..0000000
--- a/elixir-1.6.4.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c12a4931a5383a8a9e9eb006566af698e617b57a1f645a6cb132a321b671292d
-size 2074206
diff --git a/elixir-1.6.6.tar.gz b/elixir-1.6.6.tar.gz
new file mode 100644
index 0000000..be39fff
--- /dev/null
+++ b/elixir-1.6.6.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:74507b0646bf485ee3af0e7727e3fdab7123f1c5ecf2187a52a928ad60f93831
+size 2078742
diff --git a/elixir-doc.spec b/elixir-doc.spec
index 2054ab4..abe11d4 100644
--- a/elixir-doc.spec
+++ b/elixir-doc.spec
@@ -17,7 +17,7 @@
 
 
 Name:           elixir-doc
-Version:        1.6.4
+Version:        1.6.6
 Release:        0
 Summary:        Documentation for elixir
 License:        Apache-2.0 and ErlPL-1.1
diff --git a/elixir.changes b/elixir.changes
index 9d4b6d9..4beeafb 100644
--- a/elixir.changes
+++ b/elixir.changes
@@ -1,3 +1,44 @@
+-------------------------------------------------------------------
+Sun Jul  1 08:02:34 UTC 2018 - develop7@develop7.info
+
+- Elixir 1.6.6
+  This release supports Erlang/OTP 21.0 by removing all warnings and by 
+  properly supporting the new Erlang logger module.
+
+  * Bug fixes
+    [Base] Do not raise when finding bad digits in Base.decode32! with 
+    `case: :mixed`
+    [Code] Preserve the user's choice when fn is followed by a newline and it 
+    has only a single clause
+    [DynamicSupervisor] Properly account for restarting children in the 
+    `:max_children` configuration
+    [String] Add performant impl for string upcase/downcase :ascii mode
+    [Task.Supervisor] Fix type spec for start_child/4
+    [Logger] Do not crash truncation when truncate is set to infinity
+    [mix format] Match files starting with dot
+
+- Elixir 1.6.5
+  This release supports Erlang/OTP 21.0-rc by removing all warnings and by 
+  properly redirecting logger output. Note it is not guaranteed it will support 
+  Erlang/OTP 21.0 final.
+
+  Bug fixes
+    [Code] Preserve the user's choice in the formatter on parens call with next 
+    break fits
+    [Code] Preserve the user's choice in the formatter on calls without parens 
+    when we have one argument per line
+    [Code] Fix formatting when there is a tilde in the first element of a 
+    bitstring
+    [Kernel] Support specsdiff flag on __info__ spec clauses
+    [Kernel] Do not exclude hygienic vars in defguard
+    [Kernel.SpecialForms] Mark for comprehensions as generated to avoid 
+    dialyzer warnings
+    [Macro] Make sure Macro.to_string/2 emits valid quoted expressions
+    [Task] Support :infinity timeout on Task.yield_many/2
+    [Task.Supervisor] Do not crash spawning supervised tasks when the parent 
+    process is dead
+    [URI] Fix parsing of URIs with trailing ?
+
 -------------------------------------------------------------------
 Thu Apr 12 15:39:08 UTC 2018 - develop7@develop7.info
 
diff --git a/elixir.spec b/elixir.spec
index 97d8d2b..db1eb99 100644
--- a/elixir.spec
+++ b/elixir.spec
@@ -17,7 +17,7 @@
 
 
 Name:           elixir
-Version:        1.6.4
+Version:        1.6.6
 Release:        0
 Summary:        Functional meta-programming aware language built on top of the Erlang
 License:        Apache-2.0 and ErlPL-1.1