diff --git a/pkgs/development/compilers/emscripten-fastcomp/default.nix b/pkgs/development/compilers/emscripten-fastcomp/default.nix
index 36c05195e37..bcbe28f2335 100644
--- a/pkgs/development/compilers/emscripten-fastcomp/default.nix
+++ b/pkgs/development/compilers/emscripten-fastcomp/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchgit, python }:
 
 let
-  tag = "1.29.3";
+  tag = "1.29.10";
 in
 
 stdenv.mkDerivation rec {
@@ -10,13 +10,13 @@ stdenv.mkDerivation rec {
   srcFC = fetchgit {
     url = git://github.com/kripken/emscripten-fastcomp;
     rev = "refs/tags/${tag}";
-    sha256 = "ab44554dc43eee5552ea04c134a5aaff2cd32f6f6528f58a24025bcd8fd1d46e";
+    sha256 = "eee0f884c7e10e1b869b9d3afbb03bf69c63ec0560b136e3e8cd64ca00a41653";
   };
 
   srcFL = fetchgit {
     url = git://github.com/kripken/emscripten-fastcomp-clang;
     rev = "refs/tags/${tag}";
-    sha256 = "cc6dd704f5eba64fda931833479003bf3c8d9cf781bbaac3aa22a7b2644ccb26";
+    sha256 = "22c48e85dfacd9f2349d37fb421f0f848b65fc7b39e66984d04349ee3271667c";
   };
 
   buildInputs = [ python ];
diff --git a/pkgs/development/compilers/emscripten/default.nix b/pkgs/development/compilers/emscripten/default.nix
index cc7982345d4..efe8be2051f 100644
--- a/pkgs/development/compilers/emscripten/default.nix
+++ b/pkgs/development/compilers/emscripten/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchgit, emscriptenfastcomp, python, nodejs, closurecompiler, jre }:
 
 let
-  tag = "1.29.3";
+  tag = "1.29.10";
 in
 
 stdenv.mkDerivation rec {
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   src = fetchgit {
     url = git://github.com/kripken/emscripten;
     rev = "refs/tags/${tag}";
-    sha256 = "7f65d1d5cc1c1866554cd79ff83f87fc72a7df59cf1dfd6481e3f0aed5c7dc1f";
+    sha256 = "0d7ed2b801ac37acaf907bd03ba42cce3ac4a4c330bf1ef28de25bbb3f39ba87";
   };
 
   buildCommand = ''