diff --git a/shared/chains.py b/shared/chains.py
index 87385711..34c5e2a9 100644
--- a/shared/chains.py
+++ b/shared/chains.py
@@ -303,7 +303,7 @@ class BitcoinMain(ChainsBase):
     # see <https://github.com/bitcoin/bitcoin/blob/master/src/chainparams.cpp#L140>
     ctype = 'BTC'
     name = 'Bitcoin Mainnet'
-    ccc_min_block = 890584
+    ccc_min_block = 892714          # Apr 16/2025
 
     slip132 = {
         AF_CLASSIC:     Slip132Version(0x0488B21E, 0x0488ADE4, 'x'),
diff --git a/stm32/COLDCARD_MK4/file_time.c b/stm32/COLDCARD_MK4/file_time.c
index b31d45c8..47fd80ed 100644
--- a/stm32/COLDCARD_MK4/file_time.c
+++ b/stm32/COLDCARD_MK4/file_time.c
@@ -2,12 +2,12 @@
 //
 // AUTO-generated.
 //
-//   built: 2025-02-26
-// version: 5.5.0
+//   built: 2025-04-15
+// version: 5.4.2
 //
 #include <stdint.h>
 
 // this overrides ports/stm32/fatfs_port.c
 uint32_t get_fattime(void) {
-    return 0x5a5a28a0UL;
+    return 0x5a8f2880UL;
 }