diff --git a/firmware/src_simtrace/usb.c b/firmware/src_simtrace/usb.c
index 7cd4feb..a13c2de 100644
--- a/firmware/src_simtrace/usb.c
+++ b/firmware/src_simtrace/usb.c
@@ -284,7 +284,7 @@
         CCID_DECRIPTOR_TYPE,    // bDescriptorType:Functional descriptor type
         CCID1_10,               // bcdCCID: CCID version
         0,               // bMaxSlotIndex: Value 0 indicates that one slot is supported
-        VOLTS_5_0,       // bVoltageSupport
+        VOLTS_3_0,       // bVoltageSupport
         (1 << PROTOCOL_TO),     // dwProtocols
         3580,            // dwDefaultClock
         3580,            // dwMaxClock
@@ -460,7 +460,7 @@
         CCID_DECRIPTOR_TYPE,    // bDescriptorType:Functional descriptor type
         CCID1_10,               // bcdCCID: CCID version
         0,               // bMaxSlotIndex: Value 0 indicates that one slot is supported
-        VOLTS_5_0,       // bVoltageSupport
+        VOLTS_3_0,       // bVoltageSupport
         (1 << PROTOCOL_TO),     // dwProtocols
         3580,            // dwDefaultClock
         3580,            // dwMaxClock