diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index fdf759f0..597efc3e 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -221,3 +221,5 @@ jobs:
       run: pio ci --board=rpipico --board=adafruit_feather -O "platform_packages=framework-arduinopico@symlink:///home/runner/work/arduino-pico/arduino-pico" -O "build_flags=-DUSE_TINYUSB" libraries/Adafruit_TinyUSB_Arduino/examples/CDC/cdc_multi/cdc_multi.ino
     - name: Build WiFi Example
       run: pio ci --board=rpipicow -O "platform_packages=framework-arduinopico@symlink:///home/runner/work/arduino-pico/arduino-pico" libraries/WiFi/examples/ScanNetworks/ScanNetworks.ino
+    - name: Build Signed OTA Example
+      run: pio ci --board=rpipicow -O "platform_packages=framework-arduinopico@symlink:///home/runner/work/arduino-pico/arduino-pico" libraries/ArduinoOTA/examples/SignedOTA/SignedOTA.ino
diff --git a/libraries/LEAmDNS/keywords.txt b/libraries/LEAmDNS/keywords.txt
index 6b2f0395..c34dcab5 100644
--- a/libraries/LEAmDNS/keywords.txt
+++ b/libraries/LEAmDNS/keywords.txt
@@ -6,7 +6,7 @@
 # Datatypes (KEYWORD1)
 #######################################
 
-ESP8266mDNS	KEYWORD1
+LEAmDNS	KEYWORD1
 MDNSResponder	KEYWORD1
 MDNS	KEYWORD1
 
diff --git a/libraries/MD5Builder/library.properties b/libraries/MD5Builder/library.properties
index 485a13bc..26c4e7a6 100644
--- a/libraries/MD5Builder/library.properties
+++ b/libraries/MD5Builder/library.properties
@@ -8,3 +8,4 @@ category=Data Processing
 url=https://github.com/earlephilhower/arduino-pico
 architectures=rp2040
 dot_a_linkage=true
+includes=MD5Builder.h
diff --git a/libraries/Updater/library.properties b/libraries/Updater/library.properties
index 5af011ed..a9fc293d 100644
--- a/libraries/Updater/library.properties
+++ b/libraries/Updater/library.properties
@@ -7,4 +7,5 @@ paragraph=With this library you can enable your sketch to be upgraded over netwo
 category=Communication
 url=https://github.com/earlephilhower/arduino-pico
 architectures=rp2040
+depends=MD5Builder,PicoOTA
 dot_a_linkage=true
diff --git a/libraries/WiFi/library.properties b/libraries/WiFi/library.properties
index 7e94887e..1d6fa84e 100644
--- a/libraries/WiFi/library.properties
+++ b/libraries/WiFi/library.properties
@@ -9,3 +9,4 @@ url=http://github.com/earlephilhower/arduino-pico
 architectures=rp2040
 includes=WiFi.h
 dot_a_linkage=true
+depends=MD5Header
diff --git a/tools/platformio-build.py b/tools/platformio-build.py
index 783134f7..7cf81170 100755
--- a/tools/platformio-build.py
+++ b/tools/platformio-build.py
@@ -148,6 +148,7 @@ env.Append(
 
     # link lib/libpico.a by full path, ignore libstdc++
     LIBS=[
+        File(os.path.join(FRAMEWORK_DIR, "lib", "ota.o")),
         libpico,
         File(os.path.join(FRAMEWORK_DIR, "lib", "libbearssl.a")),
         "m", "c", stdcpp_lib, "c"]
@@ -301,7 +302,7 @@ if variant != "":
     ])
 
     env.Append(CPPDEFINES=[
-        ("ARDUINO_VARIANT", '"' + variant + '"'),
+        ("ARDUINO_VARIANT", '\\"' + variant + '\\"'),
     ])