diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 88bca9f..255dafd 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,7 +12,7 @@ sphinx:
   configuration: docs/conf.py
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-lts-latest
   tools:
     python: "3"
 
diff --git a/README.rst b/README.rst
index 06123d2..40ff1b1 100644
--- a/README.rst
+++ b/README.rst
@@ -75,7 +75,7 @@ Usage Example
 
     sm = rp2pio.StateMachine(
         assembled,
-        frequency=2000,
+        frequency=4000,
         init=adafruit_pioasm.assemble("set pindirs 1"),
         first_set_pin=board.LED,
     )
diff --git a/examples/pioasm_7seg.py b/examples/pioasm_7seg.py
index f8a7def..495aefc 100644
--- a/examples/pioasm_7seg.py
+++ b/examples/pioasm_7seg.py
@@ -116,7 +116,7 @@ def __init__(self, first_pin=board.GP9):
         self._buf = array.array("H", (DIGITS_WT[0] & ~COM_WT[i] for i in range(4)))
         self._sm = rp2pio.StateMachine(
             _program.assembled,
-            frequency=2000,
+            frequency=4000,
             first_out_pin=first_pin,
             out_pin_count=14,
             auto_pull=True,
diff --git a/examples/pioasm_hello.py b/examples/pioasm_hello.py
index 7796253..fc8334e 100644
--- a/examples/pioasm_hello.py
+++ b/examples/pioasm_hello.py
@@ -27,7 +27,7 @@
 
 sm = rp2pio.StateMachine(
     assembled,
-    frequency=2000,
+    frequency=4000,
     first_out_pin=board.LED,
 )
 print("real frequency", sm.frequency)