diff --git a/CHANGELOG.md b/CHANGELOG.md
index af205bb..71fef91 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@ For the latest two player PCB 2.0, you need:
 ## Features
 - Enable fastscrolling in the menu, by holding up/down/left/right for 500 milliseconds, repeat delay is 40 milliseconds.
 - bld.sh mow uses the amount of cores available on the system to speed up the build process. An optional -p flag can be used to specify the amount of cores to use.
+- uses latest version of pico_shared and pico_lib submodules.
 
 ## Fixes
 - Temporary Rollback NesPad code for the WaveShare RP2040-PiZero only. Other configurations are not affected.
diff --git a/main.cpp b/main.cpp
index c130a57..5a08dd0 100644
--- a/main.cpp
+++ b/main.cpp
@@ -23,6 +23,11 @@
 #include "mytypes.h"
 #include "gb.h"
 
+#ifndef CPUKFREQKHZ
+//#define CPUKFREQKHZ 266000
+#define CPUKFREQKHZ 252000
+#endif
+
 char *romName;
 
 bool isFatalError = false;
@@ -51,7 +56,7 @@ bool reset = false;
 
 namespace
 {
-    constexpr uint32_t CPUFreqKHz = 266000; // 252000;
+    constexpr uint32_t CPUFreqKHz = CPUKFREQKHZ; // 252000;
      dvi::DVI::LineBuffer *currentLineBuffer_{};
 }
 
diff --git a/pico_lib b/pico_lib
index c0ad390..268c158 160000
--- a/pico_lib
+++ b/pico_lib
@@ -1 +1 @@
-Subproject commit c0ad39054d0a0a6e46746333f7fcd4863ee66ae7
+Subproject commit 268c158307352f0d20aee3cd349e220cd5f54632
diff --git a/pico_shared b/pico_shared
index ed58bb8..4cfb47d 160000
--- a/pico_shared
+++ b/pico_shared
@@ -1 +1 @@
-Subproject commit ed58bb8cfc22eb18ed3de71f0f3390cd3df5b6de
+Subproject commit 4cfb47de7fef9c700daadbde29af4d341710d8b3