diff --git a/pkgs/development/interpreters/erlang/R21.nix b/pkgs/development/interpreters/erlang/R21.nix
index 1ca652eed660..965845c5a33a 100644
--- a/pkgs/development/interpreters/erlang/R21.nix
+++ b/pkgs/development/interpreters/erlang/R21.nix
@@ -1,8 +1,8 @@
 { mkDerivation }:
 
 mkDerivation rec {
-  version = "21.1.2";
-  sha256 = "0kn6ghr151b1qmbazc1c8k1r0wpsrqh9l3wrhfyxix3ld5yc3a5c";
+  version = "21.1.3";
+  sha256 = "0374qpafrpnfspsvjaa3sgs0h8ryi3ah8fvmr7dm7zsmgb4ihdsg";
 
   prePatch = ''
     substituteInPlace configure.in --replace '`sw_vers -productVersion`' '10.10'