diff --git a/frontends/web/templates/about.html b/frontends/web/templates/about.html
index 392d42c..7db8d58 100644
--- a/frontends/web/templates/about.html
+++ b/frontends/web/templates/about.html
@@ -565,7 +565,7 @@
                                         </tr>
                                         <tr>
                                             <td><i class="bi bi-clock me-2"></i>File expiry</td>
-                                            <td><strong>5 min</strong></td>
+                                            <td><strong>10 min</strong></td>
                                         </tr>
                                         <tr>
                                             <td><i class="bi bi-key me-2"></i>PIN</td>
diff --git a/frontends/web/templates/decode.html b/frontends/web/templates/decode.html
index c6c90d6..e80228d 100644
--- a/frontends/web/templates/decode.html
+++ b/frontends/web/templates/decode.html
@@ -158,7 +158,7 @@
 
                 <div class="alert alert-warning small">
                     <i class="bi bi-clock me-1"></i>
-                    <strong>File expires in 5 minutes.</strong> Download now.
+                    <strong>File expires in 10 minutes.</strong> Download now.
                 </div>
 
                 <a href="/decode" class="btn btn-outline-light w-100">
diff --git a/frontends/web/templates/encode_result.html b/frontends/web/templates/encode_result.html
index 6fbd092..4d2219e 100644
--- a/frontends/web/templates/encode_result.html
+++ b/frontends/web/templates/encode_result.html
@@ -128,7 +128,7 @@
                     <i class="bi bi-exclamation-triangle me-1"></i>
                     <strong>Important:</strong>
                     <ul class="mb-0 mt-2">
-                        <li>This file expires in <strong>5 minutes</strong></li>
+                        <li>This file expires in <strong>10 minutes</strong></li>
                         <li>Do <strong>not</strong> resize or recompress the image</li>
                         {% if embed_mode == 'dct' and output_format == 'jpeg' %}
                         <li>JPEG format is lossy - avoid re-saving or editing</li>
diff --git a/src/stegasoo/constants.py b/src/stegasoo/constants.py
index 724b5cf..38b419d 100644
--- a/src/stegasoo/constants.py
+++ b/src/stegasoo/constants.py
@@ -108,8 +108,8 @@ MIN_KEY_PASSWORD_LENGTH = 8
 # ============================================================================
 
 # Temporary file storage
-TEMP_FILE_EXPIRY = 300  # 5 minutes in seconds
-TEMP_FILE_EXPIRY_MINUTES = 5
+TEMP_FILE_EXPIRY = 600  # 10 minutes in seconds
+TEMP_FILE_EXPIRY_MINUTES = 10
 
 # Thumbnail settings
 THUMBNAIL_SIZE = (250, 250)  # Maximum dimensions for thumbnails