diff --git a/pkgs/development/python-modules/rpy2/default.nix b/pkgs/development/python-modules/rpy2/default.nix
index f907f72ff244..61447e740265 100644
--- a/pkgs/development/python-modules/rpy2/default.nix
+++ b/pkgs/development/python-modules/rpy2/default.nix
@@ -20,7 +20,7 @@ buildPythonPackage rec {
     version = if isPy27 then
       "2.8.6" # python2 support dropped in 2.9.x
     else
-      "2.9.3";
+      "2.9.4";
     pname = "rpy2";
     disabled = isPyPy;
     src = fetchPypi {
@@ -28,7 +28,7 @@ buildPythonPackage rec {
       sha256 = if isPy27 then
         "162zki5c1apgv6qbafi7n66y4hgpgp43xag7q75qb6kv99ri6k80" # 2.8.x
       else
-        "1b72958e683339ea0c3bd9f73738e9ece2da8da8008a10e2e0c68fc7864e9361"; # 2.9.x
+        "0bl1d2qhavmlrvalir9hmkjh74w21vzkvc2sg3cbb162s10zfmxy"; # 2.9.x
     };
     buildInputs = [
       readline