diff --git a/nix/tahoe-lafs.nix b/nix/tahoe-lafs.nix
index 59864d36d..04d6c4163 100644
--- a/nix/tahoe-lafs.nix
+++ b/nix/tahoe-lafs.nix
@@ -7,7 +7,7 @@
 , html5lib, pyutil, distro, configparser, klein, cbor2
 }:
 python.pkgs.buildPythonPackage rec {
-  # Most of the time this is not exactly the release version (eg 1.16.0).
+  # Most of the time this is not exactly the release version (eg 1.17.0).
   # Give it a `post` component to make it look newer than the release version
   # and we'll bump this up at the time of each release.
   #
@@ -20,7 +20,7 @@ python.pkgs.buildPythonPackage rec {
   # is not a reproducable artifact (in the sense of "reproducable builds") so
   # it is excluded from the source tree by default.  When it is included, the
   # package tends to be frequently spuriously rebuilt.
-  version = "1.16.0.post1";
+  version = "1.17.0.post1";
   name = "tahoe-lafs-${version}";
   src = lib.cleanSourceWith {
     src = ../.;