diff --git a/pkgs/development/python-modules/elasticsearch-curator/default.nix b/pkgs/development/python-modules/elasticsearch-curator/default.nix
index b65e524346f..d517af949d4 100644
--- a/pkgs/development/python-modules/elasticsearch-curator/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-curator/default.nix
@@ -17,11 +17,11 @@
 
 buildPythonPackage rec {
   pname   = "elasticsearch-curator";
-  version = "5.6.0";
+  version = "5.7.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0r4p229233ivprxnvp33hilkgczijmyvi33wivxhhj6q3kkywpyq";
+    sha256 = "0a6q7jcqwcqf8cv76lzldf90hnj2x8gha754x515dq10zsi9sjms";
   };
 
   # The test hangs so we disable it.
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 23021c99d1d..bae2f747cc9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2706,6 +2706,13 @@ in
           sha256 = "f15516df478d5a56180fbf80e68f206010e6d160fc39fa508b65e035fd75130b";
         };
       });
+      pyyaml = super.pyyaml.overridePythonAttrs (oldAttrs: rec {
+        version = "3.12";
+        src = oldAttrs.src.override {
+          inherit version;
+          sha256 = "1aqjl8dk9amd4zr99n8v2qxzgmr2hdvqfma4zh7a41rj6336c9sr";
+        };
+      });
     };
   }).pkgs; toPythonApplication elasticsearch-curator;