diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 132fac5..1531db2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,10 +85,14 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 22
+      - name: Cache dos pacotes do Tauri (.deb)
+        uses: actions/cache@v6
+        with:
+          path: ~/apt-cache
+          key: apt-tauri-${{ runner.os }}-${{ runner.arch }}-${{ env.ImageVersion }}-${{ hashFiles('scripts/install-tauri-deps.sh') }}
       - name: Dependências do Tauri
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev patchelf
+        timeout-minutes: 25
+        run: scripts/install-tauri-deps.sh
       - name: Gera os ícones
         run: npx --yes @tauri-apps/cli@2 icon apps/gui/src-tauri/icons/source.png -o apps/gui/src-tauri/icons
       - run: cargo check --manifest-path apps/gui/src-tauri/Cargo.toml
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fc62acd..50637c1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -106,11 +106,16 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 22
+      - name: Cache dos pacotes do Tauri (.deb)
+        if: runner.os == 'Linux'
+        uses: actions/cache@v6
+        with:
+          path: ~/apt-cache
+          key: apt-tauri-${{ runner.os }}-${{ runner.arch }}-${{ env.ImageVersion }}-${{ hashFiles('scripts/install-tauri-deps.sh') }}
       - name: Dependências do Tauri (Linux)
         if: runner.os == 'Linux'
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev patchelf
+        timeout-minutes: 25
+        run: scripts/install-tauri-deps.sh
       - name: Gera os ícones
         run: npx --yes @tauri-apps/cli@2 icon apps/gui/src-tauri/icons/source.png -o apps/gui/src-tauri/icons
       - uses: tauri-apps/tauri-action@v1
diff --git a/scripts/install-tauri-deps.sh b/scripts/install-tauri-deps.sh
new file mode 100755
index 0000000..de865d7
--- /dev/null
+++ b/scripts/install-tauri-deps.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# Instala as bibliotecas do Tauri no Linux do CI (WebKitGTK e afins) sem depender do espelho do
+# apt estar rápido: usa os .deb em cache quando existem e, se o apt travar ou falhar, tenta de novo.
+#
+# O passo "Dependências do Tauri" já levou de 22 a 28 minutos num dia de espelho lento, contra
+# uns 35 s no normal. Aqui cada tentativa tem tempo limite e o cache evita o download.
+#
+# Uso: scripts/install-tauri-deps.sh [pasta-do-cache]   (padrão: ~/apt-cache)
+set -euo pipefail
+cache="${1:-$HOME/apt-cache}"
+pkgs=(libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev patchelf)
+mkdir -p "$cache/partial"
+
+# 1) tudo em cache: instala direto, sem nem atualizar o índice do apt
+if ls "$cache"/*.deb >/dev/null 2>&1 && timeout 300 sudo apt-get -o "Dir::Cache::archives=$cache" -y install "${pkgs[@]}"; then
+  echo "instalado a partir do cache"
+  exit 0
+fi
+
+# 2) sem cache (ou incompleto): atualiza e instala, até 3 tentativas com tempo limite
+for tentativa in 1 2 3; do
+  if timeout 240 sudo apt-get update && timeout 600 sudo apt-get -o "Dir::Cache::archives=$cache" -y install "${pkgs[@]}"; then
+    echo "instalado (tentativa $tentativa)"
+    exit 0
+  fi
+  echo "apt falhou ou passou do tempo (tentativa $tentativa de 3)" >&2
+  sleep $((tentativa * 10))
+done
+echo "não foi possível instalar as dependências do Tauri" >&2
+exit 1