diff --git a/0x0001_hello-world/CMakeLists.txt b/0x0001_hello-world/CMakeLists.txt
index e3e6319..b2fc054 100644
--- a/0x0001_hello-world/CMakeLists.txt
+++ b/0x0001_hello-world/CMakeLists.txt
@@ -51,7 +51,7 @@ target_link_libraries(0x0001_hello-world
         pico_stdlib
         )
 
-pico_enable_stdio_usb(0x0001_hello-world 1)
+pico_enable_stdio_usb(0x0001_hello-world 0)
 pico_enable_stdio_uart(0x0001_hello-world 1)
 
 pico_add_extra_outputs(0x0001_hello-world)
diff --git a/0x0005_intro-to-variables/CMakeLists.txt b/0x0005_intro-to-variables/CMakeLists.txt
index 56648e1..8c10ec6 100644
--- a/0x0005_intro-to-variables/CMakeLists.txt
+++ b/0x0005_intro-to-variables/CMakeLists.txt
@@ -51,7 +51,7 @@ target_link_libraries(0x0005_intro-to-variables
         pico_stdlib
         )
 
-pico_enable_stdio_usb(0x0005_intro-to-variables 1)
+pico_enable_stdio_usb(0x0005_intro-to-variables 0)
 pico_enable_stdio_uart(0x0005_intro-to-variables 1)
 
 pico_add_extra_outputs(0x0005_intro-to-variables)
diff --git a/0x0008_unitialized-variables/CMakeLists.txt b/0x0008_unitialized-variables/CMakeLists.txt
index 54da406..e582001 100644
--- a/0x0008_unitialized-variables/CMakeLists.txt
+++ b/0x0008_unitialized-variables/CMakeLists.txt
@@ -51,7 +51,7 @@ target_link_libraries(0x0008_uninitialized-variables
         pico_stdlib
         )
 
-pico_enable_stdio_usb(0x0008_uninitialized-variables 1)
+pico_enable_stdio_usb(0x0008_uninitialized-variables 0)
 pico_enable_stdio_uart(0x0008_uninitialized-variables 1)
 
 pico_add_extra_outputs(0x0008_uninitialized-variables)