diff --git a/pkgs/by-name/od/odoo18/package.nix b/pkgs/by-name/od/odoo18/package.nix
index bb2e3174eda6..985f7bb1bc26 100644
--- a/pkgs/by-name/od/odoo18/package.nix
+++ b/pkgs/by-name/od/odoo18/package.nix
@@ -9,7 +9,7 @@
 
 let
   odoo_version = "18.0";
-  odoo_release = "20250506";
+  odoo_release = "20260420";
   python = python312.override {
     self = python;
   };
@@ -21,9 +21,9 @@ python.pkgs.buildPythonApplication rec {
 
   src = fetchzip {
     # find latest version on https://nightly.odoo.com/${odoo_version}/nightly/src
-    url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.zip";
+    url = "https://nightly.odoo.com/${odoo_version}/nightly/src/odoo_${version}.tar.gz";
     name = "odoo-${version}";
-    hash = "sha256-rNG0He+51DnRT5g1SovGZ9uiE1HWXtcmAybcadBMjY4="; # odoo
+    hash = "sha256-+ilM07s33pdwZc3XoAXbID7MRz/m6PHnzjHzi183eyM="; # odoo
   };
 
   postPatch = ''
diff --git a/pkgs/by-name/od/odoo18/update.sh b/pkgs/by-name/od/odoo18/update.sh
index 2265f9048c0e..491b64cbbb73 100755
--- a/pkgs/by-name/od/odoo18/update.sh
+++ b/pkgs/by-name/od/odoo18/update.sh
@@ -27,6 +27,6 @@ fi
 
 cd "$SCRIPT_DIR"
 
-sed -ri "s| hash.+ # odoo| hash = \"$(nix-prefetch -q fetchzip --option extra-experimental-features flakes --url "https://nightly.odoo.com/${VERSION}/nightly/src/odoo_${latestVersion}.zip")\"; # odoo|g" package.nix
+sed -ri "s| hash.+ # odoo| hash = \"$(nix-prefetch -q fetchzip --option extra-experimental-features flakes --url "https://nightly.odoo.com/${VERSION}/nightly/src/odoo_${latestVersion}.tar.gz")\"; # odoo|g" package.nix
 sed -ri "s|odoo_version = .+|odoo_version = \"$VERSION\";|" package.nix
 sed -ri "s|odoo_release = .+|odoo_release = \"$RELEASE\";|" package.nix