diff --git a/lib/esp32/libc_speech_features.a b/lib/esp32/libc_speech_features.a
index cdbee7b..70f074e 100644
Binary files a/lib/esp32/libc_speech_features.a and b/lib/esp32/libc_speech_features.a differ
diff --git a/lib/esp32/libesp_audio_front_end.a b/lib/esp32/libesp_audio_front_end.a
index 41350f8..cf73428 100644
Binary files a/lib/esp32/libesp_audio_front_end.a and b/lib/esp32/libesp_audio_front_end.a differ
diff --git a/lib/esp32/libesp_audio_processor.a b/lib/esp32/libesp_audio_processor.a
index 7431a77..047891e 100644
Binary files a/lib/esp32/libesp_audio_processor.a and b/lib/esp32/libesp_audio_processor.a differ
diff --git a/lib/esp32/libmultinet.a b/lib/esp32/libmultinet.a
index 56846ce..44c3a18 100644
Binary files a/lib/esp32/libmultinet.a and b/lib/esp32/libmultinet.a differ
diff --git a/lib/esp32/libwakenet.a b/lib/esp32/libwakenet.a
index 4dac780..d3e02c6 100644
Binary files a/lib/esp32/libwakenet.a and b/lib/esp32/libwakenet.a differ
diff --git a/src/esp_mn_speech_commands.c b/src/esp_mn_speech_commands.c
index d41b286..c41641c 100644
--- a/src/esp_mn_speech_commands.c
+++ b/src/esp_mn_speech_commands.c
@@ -277,7 +277,11 @@ void esp_mn_active_commands_print(void)
 void *_esp_mn_calloc_(int n, int size)
 {
 #ifdef ESP_PLATFORM
-    return heap_caps_calloc(n, size, MALLOC_CAP_SPIRAM);
+    void *data = heap_caps_calloc(n, size, MALLOC_CAP_SPIRAM);
+    if (data == NULL) {
+        data = calloc(n, size);
+    }
+    return data;
 #else
     return calloc(n, size);
 #endif