diff --git a/pkgs/development/compilers/emscripten-fastcomp/default.nix b/pkgs/development/compilers/emscripten-fastcomp/default.nix
index 99e22215bc77..ae7a5ce87b25 100644
--- a/pkgs/development/compilers/emscripten-fastcomp/default.nix
+++ b/pkgs/development/compilers/emscripten-fastcomp/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, cmake, python, ... }:
 
 let
-  rev = "1.37.10";
+  rev = "1.37.13";
   gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
 in
 stdenv.mkDerivation rec {
@@ -10,14 +10,14 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "kripken";
     repo = "emscripten-fastcomp";
-    sha256 = "0zl55jaas3cibjscr5q1q6rgw63wqwyc9iffhvs4xi9g1bk5cnx9";
+    sha256 = "1r4f4d5dmhxqwmpf2psainx7sj1j26fdp5acifdwg4sbbpsv96az";
     inherit rev;
   };
 
   srcFL = fetchFromGitHub {
     owner = "kripken";
     repo = "emscripten-fastcomp-clang";
-    sha256 = "0cdvld0lfl3cl7m6yax7f87ip9iq4rmz8icr68l2g8bl2w8qd89j";
+    sha256 = "1p0108iz77vmzm7i1aa29sk93g5vd95xiwmags18qkr7x3fmfqsw";
     inherit rev;
   };
 
diff --git a/pkgs/development/compilers/emscripten/default.nix b/pkgs/development/compilers/emscripten/default.nix
index f118a11e4193..b39198f30a48 100644
--- a/pkgs/development/compilers/emscripten/default.nix
+++ b/pkgs/development/compilers/emscripten/default.nix
@@ -3,7 +3,7 @@
 }:
 
 let
-  rev = "1.37.10";
+  rev = "1.37.13";
   appdir = "share/emscripten";
 in
 
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "kripken";
     repo = "emscripten";
-    sha256 = "08f3zagxzsj96i09gjg1djd1bmy1gr1ar8n96mzg3ykaygf82d0s";
+    sha256 = "0xnr8nq431pksb346fwsbs5knqmcygb8mywzzl0c9nz3ims1vkx5";
     inherit rev;
   };