diff --git a/.gitea/workflows/docker.yml b/.gitea/workflows/docker.yml
index 2652ae2..e63e5ab 100644
--- a/.gitea/workflows/docker.yml
+++ b/.gitea/workflows/docker.yml
@@ -68,6 +68,21 @@ jobs:
         run: |
           set -e
           export DEBIAN_FRONTEND=noninteractive
+          
+          # 1. 同步系统时间 (修复GPG签名时间问题)
+          echo "同步系统时间..."
+          if command -v ntpdate >/dev/null 2>&1; then
+            ntpdate -s time.nist.gov || true
+          elif command -v timedatectl >/dev/null 2>&1; then
+            timedatectl set-ntp true || true
+          fi
+          date
+          
+          # 2. 配置HTTPS源 (避免HTTP连接的GPG问题)
+          echo "配置HTTPS软件源..."
+          sed -i 's|http://deb.debian.org|https://deb.debian.org|g' /etc/apt/sources.list
+          sed -i 's|http://security.debian.org|https://deb.debian.org|g' /etc/apt/sources.list
+          
           echo "等待 apt/dpkg 锁释放 (unattended-upgrades)..."
           # 等待最多 300 秒让 unattended-upgrades/apt/dpkg 锁释放
           end=$((SECONDS+300))
@@ -92,7 +107,14 @@ jobs:
             fi
             echo "仍在等待锁释放..."; sleep 5
           done
-          apt-get update -y -o Dpkg::Lock::Timeout=600
+          
+          # 3. 清理并重新安装GPG密钥
+          echo "修复GPG密钥..."
+          rm -rf /var/lib/apt/lists/*
+          apt-get clean
+          apt-get update -y -o Dpkg::Lock::Timeout=600 -o Acquire::Retries=3
+          
+          # 4. 安装软件包
           apt-get install -y -o Dpkg::Lock::Timeout=600 jq curl ca-certificates docker.io
           docker --version
           jq --version