diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -1082,13 +1082,13 @@
     };
   };
   objgraph = super.buildPythonPackage {
-    name = "objgraph-2.0.0";
+    name = "objgraph-3.1.0";
     buildInputs = with self; [];
     doCheck = false;
     propagatedBuildInputs = with self; [];
     src = fetchurl {
-      url = "https://pypi.python.org/packages/d7/33/ace750b59247496ed769b170586c5def7202683f3d98e737b75b767ff29e/objgraph-2.0.0.tar.gz";
-      md5 = "25b0d5e5adc74aa63ead15699614159c";
+      url = "https://pypi.python.org/packages/f4/b3/082e54e62094cb2ec84f8d5a49e0142cef99016491cecba83309cff920ae/objgraph-3.1.0.tar.gz";
+      md5 = "eddbd96039796bfbd13eee403701e64a";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ meld3==1.0.2
 msgpack-python==0.4.8
 MySQL-python==1.2.5
 nose==1.3.6
-objgraph==2.0.0
+objgraph==3.1.0
 packaging==15.2
 paramiko==1.15.1
 Paste==2.0.3