diff --git a/subject_text/errors/index.md b/subject_text/errors/index.md
index f04e5a2..627e9c3 100644
--- a/subject_text/errors/index.md
+++ b/subject_text/errors/index.md
@@ -1,6 +1,6 @@
 ---
 name = "Errors"
 difficulty = 1
-exercises = ["options"]
+exercises = ["option.md"]
 ---
 
diff --git a/subject_text/errors/options.md b/subject_text/errors/option.md
similarity index 100%
rename from subject_text/errors/options.md
rename to subject_text/errors/option.md