diff --git a/pkgs/development/python-modules/certifi/default.nix b/pkgs/development/python-modules/certifi/default.nix
index 79eea057454..d36f0f308d3 100644
--- a/pkgs/development/python-modules/certifi/default.nix
+++ b/pkgs/development/python-modules/certifi/default.nix
@@ -5,12 +5,12 @@
 
 buildPythonPackage rec {
   pname = "certifi";
-  version = "2017.7.27.1";
+  version = "2018.1.18";
   name = "${pname}-${version}";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "40523d2efb60523e113b44602298f0960e900388cf3bb6043f645cf57ea9e3f5";
+    sha256 = "edbc3f203427eef571f79a7692bb160a2b0f7ccaa31953e99bd17e307cf63f7d";
   };
 
   meta = {