diff --git a/nixos/doc/manual/release-notes/rl-1903.xml b/nixos/doc/manual/release-notes/rl-1903.xml
index e9f031054c73..ed62c51ce9b6 100644
--- a/nixos/doc/manual/release-notes/rl-1903.xml
+++ b/nixos/doc/manual/release-notes/rl-1903.xml
@@ -350,6 +350,14 @@
      See the <literal>fish</literal> <link xlink:href="https://github.com/fish-shell/fish-shell/releases/tag/3.0.0">release notes</link> for more information.
     </para>
    </listitem>
+  <listitem>
+    <para>
+      The ibus-table input method has had a change in config format, which
+      causes all previous settings to be lost. See
+      <link xlink:href="https://github.com/mike-fabian/ibus-table/commit/f9195f877c5212fef0dfa446acb328c45ba5852b">this commit message</link>
+      for details.
+    </para>
+  </listitem>
   </itemizedlist>
  </section>
 
diff --git a/pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix b/pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix
index 9b7895d614bc..3f2ab1fc96a9 100644
--- a/pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix
+++ b/pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix
@@ -5,13 +5,13 @@
 
 stdenv.mkDerivation rec {
   name = "ibus-table-${version}";
-  version = "1.9.20";
+  version = "1.9.21";
 
   src = fetchFromGitHub {
     owner  = "kaio";
     repo   = "ibus-table";
     rev    = version;
-    sha256 = "12rsbg8pfh567bd0n376qciclq5jr63h5gwcm54cs796bxls4w2j";
+    sha256 = "1rswbhbfvir443mw3p7xw6calkpfss4fcgn8nhfnrbin49q6w1vm";
   };
 
   postPatch = ''