diff --git a/README.md b/README.md
index f03c58a..8598efb 100644
--- a/README.md
+++ b/README.md
@@ -134,7 +134,7 @@ This is what generates expressions from tokens.
 ### Optimizations
 
 - [x] Exclude unused functions
-- [ ] Expression folding
+- [x] Constant folding
 - [ ] Function call inlining
 - [ ] Loop unrolls