diff --git a/pkgs/development/python-modules/cufflinks/default.nix b/pkgs/development/python-modules/cufflinks/default.nix
index 1344ef4d6ae..18693a204c5 100644
--- a/pkgs/development/python-modules/cufflinks/default.nix
+++ b/pkgs/development/python-modules/cufflinks/default.nix
@@ -1,4 +1,4 @@
-{ buildPythonPackage, stdenv, fetchPypi
+{ buildPythonPackage, stdenv, fetchPypi, fetchpatch
 , numpy, pandas, plotly, six, colorlover
 , ipython, ipywidgets, nose
 }:
@@ -17,6 +17,14 @@ buildPythonPackage rec {
     ipython ipywidgets
   ];
 
+  patches = [
+    # Plotly 3.8 compatibility. Remove with the next release. See https://github.com/santosjorge/cufflinks/pull/178
+    (fetchpatch {
+      url = "https://github.com/santosjorge/cufflinks/commit/cc4c23c2b45b870f6801d1cb0312948e1f73f424.patch";
+      sha256 = "1psl2h7vscpzvb4idr6s175v8znl2mfhkcyhb1926p4saswmghw1";
+    })
+  ];
+
   checkInputs = [ nose ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/plotly/default.nix b/pkgs/development/python-modules/plotly/default.nix
index 253288088c4..55963299f9c 100644
--- a/pkgs/development/python-modules/plotly/default.nix
+++ b/pkgs/development/python-modules/plotly/default.nix
@@ -11,11 +11,11 @@
 
 buildPythonPackage rec {
   pname = "plotly";
-  version = "3.7.1";
+  version = "3.9.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1gad00c0p56zvmk2yzy03m0f3fcq67q9kdgdfxph2aw905mkwddc";
+    sha256 = "498c35a2a482f7c7937fc2f3681fec653a0191dd21e40e754a6b774234cd167e";
   };
 
   propagatedBuildInputs = [