diff --git a/fichero_printer/CHANGELOG.md b/fichero_printer/CHANGELOG.md
index ba31512..802dc9f 100644
--- a/fichero_printer/CHANGELOG.md
+++ b/fichero_printer/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project are documented in this file.
 The format is based on Keep a Changelog and this project uses Semantic Versioning.
 
 
+## [0.1.33] - 2026-03-18
+
+### Fixed
+- **Web UI**: Fixed "scanForDevices is not defined" error by injecting scan function into existing script section instead of separate script tag.
+- **Web UI**: Ensured scan JavaScript is properly scoped and available when button is clicked.
+
+### Changed
+- **Web UI**: Improved JavaScript injection strategy to avoid scope issues.
+- **Web UI**: Scan function now injected directly into main script section for proper global availability.
+
 ## [0.1.32] - 2026-03-18
 
 ### Fixed
diff --git a/fichero_printer/config.yaml b/fichero_printer/config.yaml
index 59ba6b0..04dd450 100644
--- a/fichero_printer/config.yaml
+++ b/fichero_printer/config.yaml
@@ -1,5 +1,5 @@
 name: "Fichero Printer"
-version: "0.1.32"
+version: "0.1.33"
 slug: "fichero_printer"
 description: "REST API for the Fichero D11s (AiYin) thermal label printer over Bluetooth"
 url: "https://git.leuschner.dev/Tobias/Fichero"
diff --git a/fichero_printer/fichero/api.py b/fichero_printer/fichero/api.py
index 35ec923..1e52f5e 100644
--- a/fichero_printer/fichero/api.py
+++ b/fichero_printer/fichero/api.py
@@ -77,7 +77,7 @@ async def lifespan(app: FastAPI):  # noqa: ARG001
 app = FastAPI(
     title="Fichero Printer API",
     description="REST API for the Fichero D11s (AiYin) thermal label printer.",
-    version = "0.1.32",
+    version = "0.1.33",
     lifespan=lifespan,
     docs_url=None,
     redoc_url=None,
@@ -134,7 +134,7 @@ def _ui_html() -> str:
         </div>
     """
     scan_script = r'''
-<script>
+    // Scan for BLE Devices function
     async function scanForDevices() {
         console.log('Scan function called - checking elements...');
         const resultsEl = document.getElementById('scan-results');
@@ -187,18 +187,25 @@ def _ui_html() -> str:
             console.log('Scan completed. Final result:', resultsEl.textContent);
         }
     }
-</script>
-    '''
-    # Inject after the main content but before scripts
+'''
+    # Inject scan HTML after main content
     if "</main>" in template:
         parts = template.split("</main>", 1)
-        template = parts[0] + "</main>" + scan_html + scan_script + parts[1]
+        template = parts[0] + "</main>" + scan_html + parts[1]
     elif "</body>" in template:
         parts = template.split("</body>", 1)
-        template = parts[0] + scan_html + scan_script + "</body>" + parts[1]
+        template = parts[0] + scan_html + "</body>" + parts[1]
     else:
         # Fallback if no main or body tag
-        template += scan_html + scan_script
+        template += scan_html
+    
+    # Inject scan script before the closing </script> tag of the main script
+    if "</script>" in template:
+        parts = template.rsplit("</script>", 1)
+        template = parts[0] + scan_script + "</script>" + parts[1]
+    else:
+        # Fallback if no script tag found
+        template += f"<script>{scan_script}</script>"
 
     return template
 
diff --git a/pyproject.toml b/pyproject.toml
index 9aecbb2..7c779c7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "fichero-printer"
-version = "0.1.32"
+version = "0.1.33"
 description = "Web GUI, Python CLI, and protocol documentation for the Fichero D11s thermal label printer."
 readme = "README.md"
 requires-python = ">=3.10"