diff --git a/README.md b/README.md
index 332bac7..4f4cc94 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ The code aims to follow the explanations from the [NES dev wiki](https://wiki.ne
 
 ## To do:
 
-- Find any bugs with mappers 0-4 and improve mapper 5 (MMC3)
+- Fix any bugs with mappers 0-4 and improve mapper 5 (MMC3)
 
 - DMC audio channel, high- and low-pass filters
 
diff --git a/src/main.rs b/src/main.rs
index 9b0423e..0fd8f25 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -118,7 +118,7 @@ fn main() -> Result<(), String> {
 /*
 
 TODO:
-- common mappers (0 through 4 = ~1,360 games out of ~1,592, 85%)
+- fix MMC3
 - high- and low-pass audio filters
 - DMC audio channel
 - untangle CPU and APU/PPU?