diff --git a/fpga/hello_world.hex b/fpga/hello_world.hex
index 4bc8e12..0de746a 100644
--- a/fpga/hello_world.hex
+++ b/fpga/hello_world.hex
@@ -516,7 +516,7 @@ e8010010ebc1fff0
 3d20c0003842a000
 6129200060000000
 f922800079290020
-394000353d20c000
+3940001a3d20c000
 7929002061292018
 4e800020f9490000
 0000000000000000
diff --git a/hello_world/hello_world.c b/hello_world/hello_world.c
index c47146f..e4e9835 100644
--- a/hello_world/hello_world.c
+++ b/hello_world/hello_world.c
@@ -9,7 +9,7 @@
 
 static uint64_t potato_uart_base;
 
-#define PROC_FREQ 100000000
+#define PROC_FREQ 50000000
 #define UART_FREQ 115200
 #define UART_BASE 0xc0002000