diff --git a/src/device/boot.rs b/src/device/boot.rs
index f6f5e90..79c1af1 100644
--- a/src/device/boot.rs
+++ b/src/device/boot.rs
@@ -38,8 +38,8 @@ pub fn bootup(
         .use_hse(MegaHertz::from_raw(8).convert())
         .sysclk(MegaHertz::from_raw(168).convert())
         .hclk(MegaHertz::from_raw(168).convert())
-        .pclk1(MegaHertz::from_raw(32).convert())
-        .pclk2(MegaHertz::from_raw(64).convert())
+        .pclk1(MegaHertz::from_raw(42).convert())
+        .pclk2(MegaHertz::from_raw(84).convert())
         .freeze();
 
     sys_timer::setup(core_perif.SYST, clocks);