diff --git a/.gitea/workflows/image-update-and-release.yaml b/.gitea/workflows/image-update-and-release.yaml
index e8cc90b..12d7d39 100644
--- a/.gitea/workflows/image-update-and-release.yaml
+++ b/.gitea/workflows/image-update-and-release.yaml
@@ -50,12 +50,28 @@ jobs:
           echo "Current PHP: $CURRENT"
 
           # Docker Hub API v2を使用してタグを取得
+          echo "Fetching tags from Docker Hub..."
+          RAW_RESPONSE=$(curl -s "https://registry.hub.docker.com/v2/repositories/library/php/tags?page_size=100")
+
+          # デバッグ: jqが利用可能か確認
+          if ! command -v jq &> /dev/null; then
+            echo "ERROR: jq is not installed"
+            echo "Installing jq..."
+            apt-get update && apt-get install -y jq
+          fi
+
+          # タグ一覧を取得してデバッグ出力
+          echo "DEBUG: Available PHP tags (first 10):"
+          echo "$RAW_RESPONSE" | jq -r '.results[].name' | grep 'fpm-alpine' | head -10
+
           # パターン: 8.5.2-fpm-alpine3.23 形式（alpineバージョンは2-3桁に対応）
-          LATEST=$(curl -s "https://registry.hub.docker.com/v2/repositories/library/php/tags?page_size=100" | \
+          LATEST=$(echo "$RAW_RESPONSE" | \
             jq -r '.results[].name' | \
             grep -E '^[0-9]+\.[0-9]+\.[0-9]+-fpm-alpine[0-9]+\.[0-9]{2,3}$' | \
             sort -V | tail -1)
 
+          echo "DEBUG: Matched LATEST=$LATEST"
+
           if [ -z "$LATEST" ]; then
             echo "Warning: Could not fetch latest PHP version, using current"
             LATEST="$CURRENT"