diff --git a/programmer_protocol.h b/programmer_protocol.h
index b9333ff..8a9fd67 100644
--- a/programmer_protocol.h
+++ b/programmer_protocol.h
@@ -48,7 +48,8 @@ typedef enum ProgrammerCommand
     WriteChipsAt,
     ReadChipsAt,
 	SetChipsMask,
-	SetSectorLayout
+	SetSectorLayout,
+	GetFirmwareVersion
 } ProgrammerCommand;
 
 // After a command is sent, the programmer will always respond with
@@ -186,4 +187,15 @@ typedef enum ProgrammerErasePortionOfChipReply
 	ProgrammerErasePortionFinished
 } ProgrammerErasePortionOfChipReply;
 
+// -------------------------  GET FIRMWARE VERSION PROTOCOL  -------------------------
+// If the command is GetFirmwareVersion, the programmer will reply CommandReplyOK.
+// Next, it will return 4 bytes: major version, minor version, revision, and a final
+// byte where 0 means it's a normal version and 1 means it's a prerelease version.
+// Other values are reserved.
+// Finally, it will finish the response with ProgrammerGetFWVersionDone.
+typedef enum ProgrammerGetFWVersionReply
+{
+	ProgrammerGetFWVersionDone
+} ProgrammerGetFWVersionReply;
+
 #endif /* PROGRAMMER_PROTOCOL_H_ */
diff --git a/simm_programmer.c b/simm_programmer.c
index 319442b..4d2594d 100644
--- a/simm_programmer.c
+++ b/simm_programmer.c
@@ -44,6 +44,11 @@
 /// The maximum number of erase groups we deal with
 #define MAX_ERASE_SECTOR_GROUPS				10
 
+/// Version info to respond with
+#define VERSION_MAJOR						1
+#define VERSION_MINOR						5
+#define VERSION_REVISION					0
+
 /// The number of erase sector groups we know about currently.
 /// If it's zero, we don't know, so fall back to defaults.
 static uint8_t numEraseSectorGroups = 0;
@@ -282,6 +287,14 @@ static void SIMMProgrammer_HandleWaitingForCommandByte(uint8_t byte)
 		curCommandState = ReadingSectorLayout;
 		USBCDC_SendByte(CommandReplyOK);
 		break;
+	case GetFirmwareVersion:
+		USBCDC_SendByte(CommandReplyOK);
+		USBCDC_SendByte(VERSION_MAJOR);
+		USBCDC_SendByte(VERSION_MINOR);
+		USBCDC_SendByte(VERSION_REVISION);
+		USBCDC_SendByte(0);
+		USBCDC_SendByte(ProgrammerGetFWVersionDone);
+		break;
 	// We don't know what this command is, so reply that it was invalid.
 	default:
 		USBCDC_SendByte(CommandReplyInvalid);