diff --git a/bootloaders/caterina/Caterina.c b/bootloaders/caterina/Caterina.c
index c8e82a9..2b50636 100755
--- a/bootloaders/caterina/Caterina.c
+++ b/bootloaders/caterina/Caterina.c
@@ -62,6 +62,7 @@ uint16_t TxLEDPulse = 0; // time remaining for Tx LED pulse
 uint16_t RxLEDPulse = 0; // time remaining for Rx LED pulse
 
 /* Bootloader timeout timer */
+#define TIMEOUT_PERIOD	8000
 uint16_t Timeout = 0;
 
 uint16_t bootKey = 0x7777;
@@ -133,12 +134,14 @@ int main(void)
 	/* Enable global interrupts so that the USB stack can function */
 	sei();
 	
+	Timeout = 0;
+	
 	while (RunBootloader)
 	{
 		CDC_Task();
 		USB_USBTask();
 		/* Time out and start the sketch if one is present */
-		if (Timeout > 8000)
+		if (Timeout > TIMEOUT_PERIOD)
 			RunBootloader = false;
 
 		LEDPulse();
@@ -475,7 +478,11 @@ void CDC_Task(void)
 
 	if (Command == 'E')
 	{
-		RunBootloader = false;
+		/* We nearly run out the bootloader timeout clock, 
+		* leaving just a few hundred milliseconds so the 
+		* bootloder has time to respond and service any 
+		* subsequent requests */
+		Timeout = TIMEOUT_PERIOD - 250;
 	
 		// Send confirmation byte back to the host 
 		WriteNextResponseByte('\r');
diff --git a/bootloaders/caterina/Caterina.hex b/bootloaders/caterina/Caterina.hex
index 98cf01a..0975ace 100644
--- a/bootloaders/caterina/Caterina.hex
+++ b/bootloaders/caterina/Caterina.hex
@@ -1,6 +1,6 @@
 :1070000055C000006EC000006CC000006AC00000E7
 :1070100068C0000066C0000064C0000062C00000DC
-:1070200060C000005EC00000ECC400005AC0000058
+:1070200060C000005EC00000F0C400005AC0000054
 :1070300058C0000056C0000054C0000052C00000FC
 :1070400050C0000078C000004CC000004AC00000E2
 :1070500048C0000046C0000044C0000042C000001C
@@ -9,10 +9,10 @@
 :1070800030C000002EC000002CC000002AC000004C
 :1070900028C0000026C0000024C0000022C000005C
 :1070A00020C000001EC000001CC0000011241FBE34
-:1070B000CFEFDAE0DEBFCDBF11E0A0E0B1E0E6E265
+:1070B000CFEFDAE0DEBFCDBF11E0A0E0B1E0EEE25D
 :1070C000FFE702C005900D92A83AB107D9F711E089
 :1070D000A8EAB1E001C01D92AE3BB107E1F78ED343
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+:1070E00024C78ECFF89410926F00109281001092F6
 :1070F00085001092840081E085BF15BE47985D9A97
 :10710000289A0C94000008952091B2013091B301A7
 :107110002F5F3F4F3093B3012093B201932F37FF7E
@@ -66,7 +66,7 @@
 :10741000FF29E4918E2FEBDEDD2081F082E090E009
 :10742000A0E0B0E0E80EF91E0A1F1B1FE092AE01BB
 :10743000F092AF010093B0011093B101DC2418C0A9
-:10744000D801C701B695A7959795879554D5CFDEF6
+:10744000D801C701B695A7959795879558D5CFDEF2
 :1074500082E090E0A0E0B0E0E80EF91E0A1F1B1FDA
 :10746000E092AE01F092AF010093B0011093B10130
 :107470002197209709F0BECF7DC08090AE019090FB
@@ -80,7 +80,7 @@
 :1074F0000093B0011093B10102C061DE582E7424D4
 :1075000023C0E090AE01F090AF010091B001109166
 :10751000B10116950795F794E79451DE682FC701DE
-:10752000F2D48091AE019091AF01A091B001B091E1
+:10752000F6D48091AE019091AF01A091B001B091DD
 :10753000B1010296A11DB11D8093AE019093AF01E0
 :10754000A093B001B093B101219704C055247724D2
 :1075500044244394209709F0A5CF96E4691641F49A
@@ -97,12 +97,12 @@
 :107600003DCE823551F4E091AE01F091AF0105918C
 :107610001491812FECDD802F4CC0843421F5E09053
 :10762000AE01F090AF010091B0011091B10116953B
-:107630000795F794E794C3DD682FC70164D4809160
+:107630000795F794E794C3DD682FC70168D480915C
 :10764000AE019091AF01A091B001B091B10102964D
 :10765000A11DB11D8093AE019093AF01A093B00125
 :10766000B093B1010BCE843609F5E090AE01F090F5
 :10767000AF010091B0011091B101D801C701B695D9
-:10768000A7959795879537D4B2DD82E090E0A0E08A
+:10768000A795979587953BD4B2DD82E090E0A0E086
 :10769000B0E0E80EF91E0A1F1B1FE092AE01F09247
 :1076A000AF010093B0011093B10104C08B3111F010
 :1076B0008FE39DDD83E08093E9009091E800809165
@@ -115,142 +115,142 @@
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 :1077A00084B7877F84BF88E10FB6F8948093600028
 :1077B000109260000FBE20E880E090E00FB6F894D1
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 :1077E00047985D9A289A109289008AEF80938800C2
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