diff --git a/libairspyhf/src/airspyhf.c b/libairspyhf/src/airspyhf.c
index c5572ff..cc552a8 100644
--- a/libairspyhf/src/airspyhf.c
+++ b/libairspyhf/src/airspyhf.c
@@ -52,7 +52,7 @@ typedef int bool;
 #define MAX(a,b) ((a) > (b) ? a : b)
 #define MIN(a,b) ((a) < (b) ? a : b)
 
-#define SAMPLES_TO_TRANSFER (1024 * 16)
+#define SAMPLES_TO_TRANSFER (1024 * 2)
 #define SERIAL_NUMBER_UNUSED (0)
 #define RAW_BUFFER_COUNT (8)
 #define AIRSPYHF_SERIAL_SIZE (28)
diff --git a/libairspyhf/src/airspyhf.h b/libairspyhf/src/airspyhf.h
index 92a883d..8f90b1b 100644
--- a/libairspyhf/src/airspyhf.h
+++ b/libairspyhf/src/airspyhf.h
@@ -28,10 +28,10 @@ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSI
 
 #include <stdint.h>
 
-#define AIRSPYHF_VERSION "1.6.2"
+#define AIRSPYHF_VERSION "1.6.3"
 #define AIRSPYHF_VER_MAJOR 1
 #define AIRSPYHF_VER_MINOR 6
-#define AIRSPYHF_VER_REVISION 2
+#define AIRSPYHF_VER_REVISION 3
 
 #define AIRSPYHF_ENDPOINT_IN (1)