diff --git a/pkgs/development/interpreters/elixir/1.6.nix b/pkgs/development/interpreters/elixir/1.6.nix
index 32e5bb6b3234..816bd92d5eed 100644
--- a/pkgs/development/interpreters/elixir/1.6.nix
+++ b/pkgs/development/interpreters/elixir/1.6.nix
@@ -1,7 +1,7 @@
 { mkDerivation }:
 
 mkDerivation rec {
-  version = "1.6.2";
-  sha256 = "18f5afmvra78y0x73bfnwbddlyqfndyaj1h8n1ybj32w4nvy96y7";
+  version = "1.6.4";
+  sha256 = "0li2zb5ha7fdkjnzjbj3dxb9xls8xn6xr23fqwl7gp2697vcw3ws";
   minimumOTPVersion = "18";
 }