diff --git a/pkgs/by-name/fa/fastmail-desktop/linux.nix b/pkgs/by-name/fa/fastmail-desktop/linux.nix
index 98f354809842..b973981b57f1 100644
--- a/pkgs/by-name/fa/fastmail-desktop/linux.nix
+++ b/pkgs/by-name/fa/fastmail-desktop/linux.nix
@@ -66,9 +66,18 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   '';
 
   # remove musl-libc dependencies before the autoPatchelfHook
-  preFixup = ''
-    rm -r "$out/opt/fastmail/app.asar.unpacked/node_modules/@img/"{sharp-linuxmusl-x64,sharp-libvips-linuxmusl-x64}
-  '';
+  preFixup =
+    let
+      suffix =
+        {
+          aarch64-linux = "arm64";
+          x86_64-linux = "x64";
+        }
+        .${stdenvNoCC.targetPlatform.system};
+    in
+    ''
+      rm -r "$out/opt/fastmail/app.asar.unpacked/node_modules/@img/"{sharp-linuxmusl-${suffix},sharp-libvips-linuxmusl-${suffix}}
+    '';
 
   meta = meta // {
     mainProgram = "fastmail";
diff --git a/pkgs/by-name/fa/fastmail-desktop/package.nix b/pkgs/by-name/fa/fastmail-desktop/package.nix
index ae6f88fdd833..20ad3f4fa7ae 100644
--- a/pkgs/by-name/fa/fastmail-desktop/package.nix
+++ b/pkgs/by-name/fa/fastmail-desktop/package.nix
@@ -26,6 +26,7 @@ callPackage (if isDarwin then ./darwin.nix else ./linux.nix) {
     ];
     platforms = [
       "aarch64-darwin"
+      "aarch64-linux"
       "x86_64-linux"
     ];
   };
diff --git a/pkgs/by-name/fa/fastmail-desktop/sources.nix b/pkgs/by-name/fa/fastmail-desktop/sources.nix
index 374f140afcaf..ed1f0b99d90a 100644
--- a/pkgs/by-name/fa/fastmail-desktop/sources.nix
+++ b/pkgs/by-name/fa/fastmail-desktop/sources.nix
@@ -1,19 +1,26 @@
 # Generated by ./update.sh - do not update manually!
-# Last updated: 2026-03-23
+# Last updated: 2026-07-02
 { fetchurl, fetchzip }:
 {
   aarch64-darwin = {
-    version = "1.2.1";
+    version = "1.3.0";
     src = fetchurl {
-      url = "https://dl.fastmailcdn.com/desktop/production/mac/arm64/Fastmail-1.2.1-arm64-mac.zip";
-      hash = "sha512-bu6IeL8X8ogD1qSlAuApWTBTCYIk5QrjWrzjOv8fel+kqYfCIcDXP1DP1FdJwULe91zoZn4M/uDX8CoOPWa0cA==";
+      url = "https://dl.fastmailcdn.com/desktop/production/mac/arm64/Fastmail-1.3.0-arm64-mac.zip";
+      hash = "sha512-6iRUcoI0dsW5ByaQ7dv7Oki5y0Y1wuMlQjjCpqWaThttsNJ4yYXh812RGsPjJTvcwVNMvPRbmPcbb/y//mXqRg==";
+    };
+  };
+  aarch64-linux = {
+    version = "1.3.0";
+    src = fetchurl {
+      url = "https://dl.fastmailcdn.com/desktop/production/linux/arm64/com.fastmail.Fastmail-1.3.0-arm64.AppImage";
+      hash = "sha512-XJdxJVJ3xdhF04TInc3vmEtcUnzPzwujzTix+t2WbRo9qNEPqxnmN6hurGq0dZO/Dnk7jgOfAkjCpVq/kxWVRQ==";
     };
   };
   x86_64-linux = {
-    version = "1.2.1";
+    version = "1.3.0";
     src = fetchurl {
-      url = "https://dl.fastmailcdn.com/desktop/production/linux/x64/com.fastmail.Fastmail-1.2.1.AppImage";
-      hash = "sha512-xudOPNjOaumYxD7yZyjQnYhuiKqDO10cBwMdFJtVEOfHVia0jJMgdUTJx03otIBn9ijM3/1Qo6wsq1HF0A/zlQ==";
+      url = "https://dl.fastmailcdn.com/desktop/production/linux/x64/com.fastmail.Fastmail-1.3.0.AppImage";
+      hash = "sha512-KnFAmjGQGXfA83JDynSixecoqqZbnC0bYGFQVf8YfP3ITwspHNDj3TIMp2jqXKtl9j4DlH1w8eLwSbKD0En9Wg==";
     };
   };
 }
diff --git a/pkgs/by-name/fa/fastmail-desktop/update.sh b/pkgs/by-name/fa/fastmail-desktop/update.sh
index c21c13c3fe7a..4c84120dfefa 100755
--- a/pkgs/by-name/fa/fastmail-desktop/update.sh
+++ b/pkgs/by-name/fa/fastmail-desktop/update.sh
@@ -6,15 +6,19 @@ set -euo pipefail
 cd "$(readlink -e "$(dirname "${BASH_SOURCE[0]}")")"
 
 x86_64_linux_info=$(curl -fsS "https://dl.fastmailcdn.com/desktop/production/linux/x64/latest-linux.yml")
+aarch64_linux_info=$(curl -fsS "https://dl.fastmailcdn.com/desktop/production/linux/arm64/latest-linux-arm64.yml")
 aarch64_darwin_info=$(curl -fsS "https://dl.fastmailcdn.com/desktop/production/mac/arm64/latest-mac.yml")
 
 x86_64_linux_version=$(yq -r '.version' <<<"$x86_64_linux_info")
+aarch64_linux_version=$(yq -r '.version' <<<"$aarch64_linux_info")
 aarch64_darwin_version=$(yq -r '.version' <<<"$aarch64_darwin_info")
 
 x86_64_linux_url="https://dl.fastmailcdn.com/desktop/production/linux/x64/$(yq -r '.path' <<<"$x86_64_linux_info")"
+aarch64_linux_url="https://dl.fastmailcdn.com/desktop/production/linux/arm64/$(yq -r '.path' <<<"$aarch64_linux_info")"
 aarch64_darwin_url="https://dl.fastmailcdn.com/desktop/production/mac/arm64/$(yq -r '.path' <<<"$aarch64_darwin_info")"
 
 x86_64_linux_hash=$(nix-hash --type sha512 --to-sri "$(yq -r '.sha512' <<<"$x86_64_linux_info")")
+aarch64_linux_hash=$(nix-hash --type sha512 --to-sri "$(yq -r '.sha512' <<<"$aarch64_linux_info")")
 aarch64_darwin_hash=$(nix-hash --type sha512 --to-sri "$(yq -r '.sha512' <<<"$aarch64_darwin_info")")
 
 cat >sources.nix <<EOF
@@ -29,6 +33,13 @@ cat >sources.nix <<EOF
       hash = "$aarch64_darwin_hash";
     };
   };
+  aarch64-linux = {
+    version = "$aarch64_linux_version";
+    src = fetchurl {
+      url = "$aarch64_linux_url";
+      hash = "$aarch64_linux_hash";
+    };
+  };
   x86_64-linux = {
     version = "$x86_64_linux_version";
     src = fetchurl {