diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -16,11 +16,11 @@ self: super: {
     };
   };
   "attrs" = super.buildPythonPackage {
-    name = "attrs-18.2.0";
+    name = "attrs-19.1.0";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/0f/9e/26b1d194aab960063b266170e53c39f73ea0d0d3f5ce23313e0ec8ee9bdf/attrs-18.2.0.tar.gz";
-      sha256 = "0s9ydh058wmmf5v391pym877x4ahxg45dw6a0w4c7s5wgpigdjqh";
+      url = "https://files.pythonhosted.org/packages/cc/d9/931a24cc5394f19383fbbe3e1147a0291276afa43a0dc3ed0d6cd9fda813/attrs-19.1.0.tar.gz";
+      sha256 = "16g33zr5f449lqc5wgvzpknxryfzrfsxcr6kpgxwn7l5fkv71f7h";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];
diff --git a/requirements_pinned.txt b/requirements_pinned.txt
--- a/requirements_pinned.txt
+++ b/requirements_pinned.txt
@@ -1,7 +1,7 @@
 # contains not directly required libraries we want to pin the version.
 
 atomicwrites==1.2.1
-attrs==18.2.0
+attrs==19.1.0
 hupper==1.6.1
 pathlib2==2.3.4
 pygments==2.4.2