diff --git a/Catena4430_Sensor.ino b/Catena4430_Sensor.ino
index fee6a10..f28a4e8 100644
--- a/Catena4430_Sensor.ino
+++ b/Catena4430_Sensor.ino
@@ -40,7 +40,7 @@ static_assert(
     "This sketch requires Catena-Arduino-Platform v0.21.0-5 or later"
     );
 
-constexpr std::uint32_t kAppVersion = makeVersion(1,0,0,1);
+constexpr std::uint32_t kAppVersion = makeVersion(1,0,0,0);
 constexpr std::uint32_t kDoubleResetWaitMs = 3000;
 constexpr std::uint32_t kSetDoubleResetMagic = 0xCA44301;
 constexpr std::uint32_t kClearDoubleResetMagic = 0xCA44300;