diff --git a/custom_components/bahmcloud_store/panel/panel.js b/custom_components/bahmcloud_store/panel/panel.js
index 17dd9da..9ac4440 100644
--- a/custom_components/bahmcloud_store/panel/panel.js
+++ b/custom_components/bahmcloud_store/panel/panel.js
@@ -45,6 +45,11 @@ class BahmcloudStorePanel extends HTMLElement {
     this._restoreSelected = "";
     this._restoring = false;
     this._restoreError = null;
+
+    // Phase C1: selectable install version
+    this._versionsCache = {}; // repo_id -> [{ref,label,source}, ...]
+    this._versionsLoadingRepoId = null;
+    this._selectedVersionByRepoId = {}; // repo_id -> ref ("" means latest)
   }
 
   set hass(hass) {
@@ -114,7 +119,13 @@ class BahmcloudStorePanel extends HTMLElement {
     this._update();
 
     try {
-      const resp = await this._hass.callApi("post", `bcs/install?repo_id=${encodeURIComponent(repoId)}`, {});
+      const sel = this._safeText(this._selectedVersionByRepoId?.[repoId] || "").trim();
+      const qv = sel ? `&version=${encodeURIComponent(sel)}` : "";
+      const resp = await this._hass.callApi(
+        "post",
+        `bcs/install?repo_id=${encodeURIComponent(repoId)}${qv}`,
+        {},
+      );
       if (!resp?.ok) {
         this._error = this._safeText(resp?.message) || "Install failed.";
       } else {
@@ -140,7 +151,13 @@ class BahmcloudStorePanel extends HTMLElement {
     this._update();
 
     try {
-      const resp = await this._hass.callApi("post", `bcs/update?repo_id=${encodeURIComponent(repoId)}`, {});
+      const sel = this._safeText(this._selectedVersionByRepoId?.[repoId] || "").trim();
+      const qv = sel ? `&version=${encodeURIComponent(sel)}` : "";
+      const resp = await this._hass.callApi(
+        "post",
+        `bcs/update?repo_id=${encodeURIComponent(repoId)}${qv}`,
+        {},
+      );
       if (!resp?.ok) {
         this._error = this._safeText(resp?.message) || "Update failed.";
       } else {
@@ -366,8 +383,41 @@ class BahmcloudStorePanel extends HTMLElement {
     this._readmeExpanded = false;
     this._readmeCanToggle = false;
 
+    // Versions dropdown
+    if (!(repoId in this._selectedVersionByRepoId)) {
+      this._selectedVersionByRepoId[repoId] = ""; // default = latest
+    }
+
     this._update();
     this._loadReadme(repoId);
+    this._loadVersions(repoId);
+  }
+
+  async _loadVersions(repoId) {
+    if (!this._hass) return;
+    if (!repoId) return;
+
+    // Cache: avoid re-fetching repeatedly in the same session.
+    if (Array.isArray(this._versionsCache?.[repoId]) && this._versionsCache[repoId].length) {
+      return;
+    }
+
+    this._versionsLoadingRepoId = repoId;
+    this._update();
+
+    try {
+      const resp = await this._hass.callApi("get", `bcs/versions?repo_id=${encodeURIComponent(repoId)}`);
+      if (resp?.ok && Array.isArray(resp.versions)) {
+        this._versionsCache[repoId] = resp.versions;
+      } else {
+        this._versionsCache[repoId] = [];
+      }
+    } catch (e) {
+      this._versionsCache[repoId] = [];
+    } finally {
+      this._versionsLoadingRepoId = null;
+      this._update();
+    }
   }
 
   async _loadReadme(repoId) {
@@ -953,6 +1003,8 @@ class BahmcloudStorePanel extends HTMLElement {
     const r = this._detailRepo;
     if (!r) return `<div class="card">No repository selected.</div>`;
 
+    const repoId = this._safeId(r?.id) || this._detailRepoId || "";
+
     const name = this._safeText(r?.name) || "Unnamed repository";
     const url = this._safeText(r?.url) || "";
     const desc = this._safeText(r?.description) || "";
@@ -1001,8 +1053,6 @@ class BahmcloudStorePanel extends HTMLElement {
         </div>
       `;
 
-    const repoId = this._safeId(r?.id);
-
     const installed = this._asBoolStrict(r?.installed);
     const installedVersion = this._safeText(r?.installed_version);
     const installedDomains = Array.isArray(r?.installed_domains) ? r.installed_domains : [];
@@ -1015,6 +1065,32 @@ class BahmcloudStorePanel extends HTMLElement {
 
     const updateAvailable = installed && !!latestVersion && (!installedVersion || latestVersion !== installedVersion);
 
+    const versions = Array.isArray(this._versionsCache?.[repoId]) ? this._versionsCache[repoId] : [];
+    const versionsLoading = this._versionsLoadingRepoId === repoId;
+    const selectedRef = this._safeText(this._selectedVersionByRepoId?.[repoId] || "").trim();
+
+    let versionOptions = `<option value="">Latest (recommended)</option>`;
+    if (selectedRef && !versions.some((v) => this._safeText(v?.ref) === selectedRef)) {
+      versionOptions += `<option value="${this._esc(selectedRef)}" selected>Selected: ${this._esc(selectedRef)}</option>`;
+    }
+    for (const v of versions) {
+      const ref = this._safeText(v?.ref);
+      if (!ref) continue;
+      const label = this._safeText(v?.label) || ref;
+      const sel = selectedRef === ref ? "selected" : "";
+      versionOptions += `<option value="${this._esc(ref)}" ${sel}>${this._esc(label)}</option>`;
+    }
+
+    const versionSelect = `
+      <div style="margin-top:12px;">
+        <div class="muted small" style="margin-bottom:6px;"><strong>Install version:</strong></div>
+        <select id="selVersion" ${busy ? "disabled" : ""} style="width:100%;">
+          ${versionOptions}
+        </select>
+        ${versionsLoading ? `<div class="muted small" style="margin-top:6px;">Loading versions…</div>` : ``}
+      </div>
+    `;
+
     const installBtn = `<button class="primary" id="btnInstall" ${installed || busy ? "disabled" : ""}>${busyInstall ? "Installing…" : installed ? "Installed" : "Install"}</button>`;
     const updateBtn = `<button class="primary" id="btnUpdate" ${!updateAvailable || busy ? "disabled" : ""}>${busyUpdate ? "Updating…" : updateAvailable ? "Update" : "Up to date"}</button>`;
     const uninstallBtn = `<button class="primary" id="btnUninstall" ${!installed || busy ? "disabled" : ""}>${busyUninstall ? "Uninstalling…" : "Uninstall"}</button>`;
@@ -1067,6 +1143,8 @@ class BahmcloudStorePanel extends HTMLElement {
               <div style="margin-top:6px;"><strong>Domains:</strong> ${installedDomains.length ? this._esc(installedDomains.join(", ")) : "-"}</div>
             </div>
 
+            ${versionSelect}
+
             <div class="row" style="margin-top:14px; gap:10px; flex-wrap:wrap;">
               ${installBtn}
               ${updateBtn}
@@ -1091,6 +1169,7 @@ class BahmcloudStorePanel extends HTMLElement {
     const btnRestore = root.getElementById("btnRestore");
     const btnRestart = root.getElementById("btnRestart");
     const btnReadmeToggle = root.getElementById("btnReadmeToggle");
+    const selVersion = root.getElementById("selVersion");
 
     if (btnInstall) {
       btnInstall.addEventListener("click", () => {
@@ -1099,6 +1178,14 @@ class BahmcloudStorePanel extends HTMLElement {
       });
     }
 
+    if (selVersion) {
+      selVersion.addEventListener("change", () => {
+        if (!this._detailRepoId) return;
+        const v = selVersion.value != null ? String(selVersion.value) : "";
+        this._selectedVersionByRepoId[this._detailRepoId] = v;
+      });
+    }
+
     if (btnUpdate) {
       btnUpdate.addEventListener("click", () => {
         if (btnUpdate.disabled) return;