diff --git a/src/firmware-update.cpp b/src/firmware-update.cpp
index 93e9078..1e8b480 100644
--- a/src/firmware-update.cpp
+++ b/src/firmware-update.cpp
@@ -167,7 +167,7 @@
 {
     return 1024u * 1024u * v;
 }
-static constexpr size_t maxFirmwareImageSize = 32_MB;
+static constexpr size_t maxFirmwareImageSize = 33_MB;
 
 static bool localDownloadInProgress(void)
 {