diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -798,11 +798,11 @@ self: super: {
     };
   };
   "subprocess32" = super.buildPythonPackage {
-    name = "subprocess32-3.5.2";
+    name = "subprocess32-3.5.3";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/c3/5f/7117737fc7114061837a4f51670d863dd7f7f9c762a6546fa8a0dcfe61c8/subprocess32-3.5.2.tar.gz";
-      sha256 = "11v62shwmdys48g7ncs3a8jwwnkcl8d4zcwy6dk73z1zy2f9hazb";
+      url = "https://files.pythonhosted.org/packages/be/2b/beeba583e9877e64db10b52a96915afc0feabf7144dcbf2a0d0ea68bf73d/subprocess32-3.5.3.tar.gz";
+      sha256 = "1hr5fan8i719hmlmz73hf8rhq74014w07d8ryg7krvvf6692kj3b";
     };
     meta = {
       license = [ pkgs.lib.licenses.psfl ];
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ pygments==2.3.1
 pathlib2==2.3.3
 repoze.lru==0.7
 simplejson==3.11.1
-subprocess32==3.5.2
+subprocess32==3.5.3
 subvertpy==0.10.1
 
 six==1.11.0