diff --git a/changelog.md b/changelog.md
index 6061692..2334357 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2026-03-10 - 3.45.1 - fix(dees-appui)
+substitute route params into URL hash when navigating
+
+- Replaces :param placeholders in view.route with provided params before updating the URL hash.
+- Ensures window.history.pushState is called with the resolved route so URLs do not contain literal parameter tokens.
+
 ## 2026-03-10 - 3.45.0 - feat(dees-form)
 register new input components (tags, list, wysiwyg, richtext) and emit change notification for richtext updates
 
diff --git a/ts_web/00_commitinfo_data.ts b/ts_web/00_commitinfo_data.ts
index a74fca4..4f62b47 100644
--- a/ts_web/00_commitinfo_data.ts
+++ b/ts_web/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-catalog',
-  version: '3.45.0',
+  version: '3.45.1',
   description: 'A comprehensive library that provides dynamic web components for building sophisticated and modern web applications using JavaScript and TypeScript.'
 }
diff --git a/ts_web/elements/00group-appui/dees-appui/dees-appui.ts b/ts_web/elements/00group-appui/dees-appui/dees-appui.ts
index ae4740e..b2dc0aa 100644
--- a/ts_web/elements/00group-appui/dees-appui/dees-appui.ts
+++ b/ts_web/elements/00group-appui/dees-appui/dees-appui.ts
@@ -875,8 +875,13 @@ export class DeesAppui extends DeesElement {
     try {
       await this.loadView(view, params);
 
-      // Update URL hash
-      const route = view.route || viewId;
+      // Update URL hash (substitute params into route pattern)
+      let route = view.route || viewId;
+      if (params) {
+        for (const [key, val] of Object.entries(params)) {
+          route = route.replace(`:${key}`, val);
+        }
+      }
       const newHash = `#${route}`;
       if (window.location.hash !== newHash) {
         window.history.pushState({ viewId }, '', newHash);