diff --git a/README.md b/README.md
index a7fded45..0ad7cecf 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,8 @@ If you would like to support the developer with a cup of coffee you can do that
 <input type="image" src="https://www.paypalobjects.com/en_US/DK/i/btn/btn_donateCC_LG.gif" border="0" name="submit" title="PayPal - The safer, easier way to pay online!" alt="Donate with PayPal button" />
 <img alt="" border="0" src="https://www.paypal.com/en_DE/i/scr/pixel.gif" width="1" height="1" />
 </form>
-If you have any technical topics, you can file a issue in this repository. In other cases you can contact the developer via email: <img src="https://raw.githubusercontent.com/jomjol/AI-on-the-edge-device/master/images/mail.png" height="30"> 
+If you have any technical topics, you can file a issue in this repository. 
+In other cases you can contact the developer via email: <img src="https://raw.githubusercontent.com/jomjol/AI-on-the-edge-device/master/images/mail.jpg" height="30"> 
 
 ## Change log
 
diff --git a/code/main/version.cpp b/code/main/version.cpp
index 7e89be40..161c8e3b 100644
--- a/code/main/version.cpp
+++ b/code/main/version.cpp
@@ -1,4 +1,4 @@
-const char* GIT_REV="79be208";
+const char* GIT_REV="ec96b7f";
 const char* GIT_TAG="";
-const char* GIT_BRANCH="rolling";
-const char* BUILD_TIME="2021-04-23 07:05";
\ No newline at end of file
+const char* GIT_BRANCH="master";
+const char* BUILD_TIME="2021-04-23 07:11";
\ No newline at end of file
diff --git a/code/version.cpp b/code/version.cpp
index 7e89be40..161c8e3b 100644
--- a/code/version.cpp
+++ b/code/version.cpp
@@ -1,4 +1,4 @@
-const char* GIT_REV="79be208";
+const char* GIT_REV="ec96b7f";
 const char* GIT_TAG="";
-const char* GIT_BRANCH="rolling";
-const char* BUILD_TIME="2021-04-23 07:05";
\ No newline at end of file
+const char* GIT_BRANCH="master";
+const char* BUILD_TIME="2021-04-23 07:11";
\ No newline at end of file
diff --git a/firmware/bootloader.bin b/firmware/bootloader.bin
index 12bc208e..476cc5be 100644
Binary files a/firmware/bootloader.bin and b/firmware/bootloader.bin differ
diff --git a/firmware/firmware.bin b/firmware/firmware.bin
index f91f8897..dc237ebc 100644
Binary files a/firmware/firmware.bin and b/firmware/firmware.bin differ
diff --git a/images/mail.png.jpg b/images/mail.jpg
similarity index 100%
rename from images/mail.png.jpg
rename to images/mail.jpg