diff --git a/etc/nix/flake.nix b/etc/nix/flake.nix
index 10cc4c7cd..ca29e3bc7 100644
--- a/etc/nix/flake.nix
+++ b/etc/nix/flake.nix
@@ -53,9 +53,9 @@
           # mach-nix release) is usually insufficient. Use
           # ./get-latest-pypi-deps-db.sh to obtain the data rev & hash.
           pypiDataRev =
-            "499750266bb4b2840cbe856c2cc0e3297685e362"; # 2021-03-06T08:13:08Z
+            "e9b0fc6b92cd6efbca7ba3b3d4a551bcc13a73c5"; # 2021-03-27T08:13:04Z
           pypiDataSha256 =
-            "188g24k8pk4lgqybywimkvwjwh8014v6l2mrkvzv309882i9p5gc";
+            "1ssa48l2iz8kncby1gfrbds79mg114dkhpxrridwcq6q2c37p62s";
         });
 
     in {
diff --git a/requirements.txt b/requirements.txt
index a9f514698..1c3a89a71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ importlib-metadata==1.3.0
 ipython==7.13.0
 ipython-genutils==0.2.0
 jedi==0.17.0
-lxml==4.6.2
+lxml==4.6.3
 more-itertools==8.0.2
 packageurl-python==0.9.3
 packaging==19.2