diff --git a/pkgs/by-name/it/itsycal/package.nix b/pkgs/by-name/it/itsycal/package.nix
index b60ea425eb6b..2f6c0ad48f17 100644
--- a/pkgs/by-name/it/itsycal/package.nix
+++ b/pkgs/by-name/it/itsycal/package.nix
@@ -6,11 +6,11 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "itsycal";
-  version = "0.15.7";
+  version = "0.15.8";
 
   src = fetchzip {
     url = "https://itsycal.s3.amazonaws.com/Itsycal-${finalAttrs.version}.zip";
-    hash = "sha256-0JQ7fZ0cZM8DnAODZQKzUQEHQGhkNvV+0NY10Ef7MEw=";
+    hash = "sha256-zo77yCfIzb2ZmExJslQ64GPQqakXtiRmm0UYEgj+3eM=";
   };
 
   installPhase = ''
@@ -22,6 +22,10 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru = {
+    updateScript = ./update.sh;
+  };
+
   meta = {
     changelog = "https://www.mowglii.com/itsycal/versionhistory.html";
     description = "Tiny menu bar calendar";
diff --git a/pkgs/by-name/it/itsycal/update.sh b/pkgs/by-name/it/itsycal/update.sh
new file mode 100755
index 000000000000..cd176cc46860
--- /dev/null
+++ b/pkgs/by-name/it/itsycal/update.sh
@@ -0,0 +1,20 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl xq-xml common-updater-scripts
+
+set -eu
+
+ROOT="$(dirname "$(readlink -f "$0")")"
+NIX_DRV="$ROOT/package.nix"
+if [ ! -f "$NIX_DRV" ]; then
+  echo "ERROR: cannot find package.nix in $ROOT"
+  exit 1
+fi
+
+LATEST_VERSION="$(curl -Ls https://www.mowglii.com/itsycal/versionhistory.html | xq -m -q 'h4' -a 'id' | head -n1)"
+
+if [ -z "$LATEST_VERSION" ]; then
+    echo "ERROR: Failed to scrape the latest version."
+    exit 1
+fi
+
+update-source-version itsycal "$LATEST_VERSION" --file="$NIX_DRV"