diff --git a/VERSION b/VERSION
index ba50e86..bee17c9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.3.12
\ No newline at end of file
+1.3.13
\ No newline at end of file
diff --git a/packaging/debian/edgeguard-api/DEBIAN/postinst b/packaging/debian/edgeguard-api/DEBIAN/postinst
index 3153975..ead225b 100755
--- a/packaging/debian/edgeguard-api/DEBIAN/postinst
+++ b/packaging/debian/edgeguard-api/DEBIAN/postinst
@@ -951,17 +951,23 @@ KEEPALIVEDDROPIN
                     continue
                 fi
                 P_TMP="$(mktemp -d)"
-                if curl -sL --max-time 45 \
-                    "https://github.com/coreruleset/${plugin}-plugin/archive/refs/heads/main.tar.gz" \
-                    -o "${P_TMP}/p.tgz" 2>/dev/null; then
-                    tar xzf "${P_TMP}/p.tgz" -C "${P_TMP}" 2>/dev/null || true
-                    if ls "${P_TMP}"/*/plugins/${plugin}-*.conf >/dev/null 2>&1; then
-                        install -m 0644 "${P_TMP}"/*/plugins/${plugin}-*.conf \
-                            "$WAF_CRS_DIR/plugins/" 2>/dev/null \
-                            && echo "postinst: CRS-Plugin ${plugin} installiert"
+                P_OK=""
+                # Plugin-Repos nutzen teils 'main', teils 'master' als Default-
+                # Branch. curl -f (statt still einen 404 als Erfolg zu werten).
+                for P_BR in main master; do
+                    if curl -fsSL --max-time 45 \
+                        "https://github.com/coreruleset/${plugin}-plugin/archive/refs/heads/${P_BR}.tar.gz" \
+                        -o "${P_TMP}/p.tgz" 2>/dev/null \
+                        && tar xzf "${P_TMP}/p.tgz" -C "${P_TMP}" 2>/dev/null; then
+                        P_OK=1; break
                     fi
+                done
+                if [ -n "$P_OK" ] && ls "${P_TMP}"/*/plugins/${plugin}-*.conf >/dev/null 2>&1; then
+                    install -m 0644 "${P_TMP}"/*/plugins/${plugin}-*.conf \
+                        "$WAF_CRS_DIR/plugins/" 2>/dev/null \
+                        && echo "postinst: CRS-Plugin ${plugin} installiert"
                 else
-                    echo "postinst: CRS-Plugin ${plugin} Download fehlgeschlagen (kein Internet?)" >&2
+                    echo "postinst: CRS-Plugin ${plugin} nicht installiert (Download/Layout)" >&2
                 fi
                 rm -rf "${P_TMP}"
             done