diff --git a/src/cai/prompts/system_reasoner_supporter.md b/src/cai/prompts/system_reasoner_supporter.md
index 462a62fd..5e7dde59 100644
--- a/src/cai/prompts/system_reasoner_supporter.md
+++ b/src/cai/prompts/system_reasoner_supporter.md
@@ -52,7 +52,7 @@
 
     Be extremely concise, using minimal tokens.
 
-    Avoid generate innecesary tokens, dont be verbose.
+    Avoid generate innecesary tokens, don't be verbose.
 
     OUTPUT FORMAT: