diff --git a/HISTORY.md b/HISTORY.md
index 0d1774b5..db3c2125 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -20,6 +20,7 @@
     * empty categories are indicated by half-tone buttons
     * new preference setting per scene for pen color model and graphic effects, HSV or HSL, default is HSV
     * new preference setting per scene to "disable click-to-run" on blocks, for use in micro-world extensions
+    * new Signada hardware library, thanks, Citilab Barcelona!
 * **Notable Changes:**
     * saved projects remember the last edited sprite
     * libraries no longer rely on the JSF primitive, project may need to re-import their libraries to run without having to enable JS extensions
@@ -65,7 +66,10 @@
     * Chinese, thanks, Simon!
     * Brazilian Portuguese, thank you, Cassiano D'Andrea!
 
-### 2021-11-24
+### 2021-11-26
+* added signada extension files to the pwa cache
+
+### 2021-11-25
 * gui: rearranged and amended the project menu
 * German translation update for project menu entries
 * objects: fixed a FILL issue when the pen color has been set to an invalid color via a bad library
diff --git a/sw.js b/sw.js
index f4f629b9..08342c63 100644
--- a/sw.js
+++ b/sw.js
@@ -1,4 +1,4 @@
-var snapVersion = '7-dev211125'
+var snapVersion = '7-dev211126'
 
 var cacheName = 'snap-pwa',
     filesToCache = [
@@ -102,6 +102,8 @@ var cacheName = 'snap-pwa',
         'libraries/pixel_module.xml',
         'libraries/schemeNumber.js',
         'libraries/serial_module.xml',
+        'libraries/signada.js',
+        'libraries/signada.xml',
         'libraries/speech_module.xml',
         'libraries/stream-tools.xml',
         'libraries/strings.xml',