diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -762,11 +762,11 @@ self: super: {
     };
   };
   "redis" = super.buildPythonPackage {
-    name = "redis-3.4.1";
+    name = "redis-3.5.3";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/ef/2e/2c0f59891db7db087a7eeaa79bc7c7f2c039e71a2b5b0a41391e9d462926/redis-3.4.1.tar.gz";
-      sha256 = "07yaj0j9fs7xdkg5bg926fa990khyigjbp31si8ai20vj8sv7kqd";
+      url = "https://files.pythonhosted.org/packages/b3/17/1e567ff78c83854e16b98694411fe6e08c3426af866ad11397cddceb80d3/redis-3.5.3.tar.gz";
+      sha256 = "0e7e0cfca8660dea8b7d5cd8c4f6c5e29e11f31158c0b0ae91a397f00e5a05a2";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ pyramid-mako==1.1.0
 pygit2==0.28.2
 
 repoze.lru==0.7
-redis==3.4.1
+redis==3.5.3
 simplejson==3.16.0
 subprocess32==3.5.4
 subvertpy==0.10.1