diff --git a/README.md b/README.md
index ed8de8f..b6964be 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ## Completion
 
-Day 12 is missing because I did it in IPython and never bothered putting them in a source file, probably.
+Day 12 is missing because I did it in IPython and never bothered putting it in a source file, probably.
 
 |  Day | Rust  | Python | C64<br>ASM |
 | ---: | :---: | :----: | :--------: |