diff --git a/CMakeLists.txt b/CMakeLists.txt
index a36195a..c9c3b25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -148,7 +148,10 @@ if(NOT ESP_PLATFORM)
     )
     target_compile_options(pico_fido PRIVATE ${COMMON_COMPILE_OPTIONS})
 
-    pico_keys_apply_strict_flags(SOURCES ${SOURCES})
+    pico_keys_apply_strict_flags(
+        SOURCES ${SOURCES}
+        FILTER_REGEX "/src/fido/|/pico-keys-sdk/src/|/pico-keys-sdk/config/"
+    )
 
     if(NOT MSVC)
         string(FIND ${CMAKE_C_COMPILER} ":" COMPILER_COLON)
diff --git a/pico-keys-sdk b/pico-keys-sdk
index e5079e5..94ab2cc 160000
--- a/pico-keys-sdk
+++ b/pico-keys-sdk
@@ -1 +1 @@
-Subproject commit e5079e510f5dd5814e6964178af88a5e69dcc0c7
+Subproject commit 94ab2ccef750848fe0f58bcfb90f74570818d48e
diff --git a/src/fido/otp.c b/src/fido/otp.c
index dd2ded3..cf49e02 100644
--- a/src/fido/otp.c
+++ b/src/fido/otp.c
@@ -642,6 +642,7 @@ static int otp_send_frame(uint8_t *frame, size_t frame_len) {
 static int otp_hid_set_report_cb(uint8_t itf, uint8_t report_id, hid_report_type_t report_type, uint8_t const *buffer, uint16_t bufsize) {
     (void)itf;
     (void)report_id;
+    (void)bufsize;
     if (report_type == 3) {
         DEBUG_PAYLOAD(buffer, bufsize);
         if (buffer[7] == 0xFF) { // reset