diff --git a/my-blog/content/posts/2025-09-05-plc.md b/my-blog/content/posts/2025-09-05-plc.md
index 076c25e..a547ea7 100644
--- a/my-blog/content/posts/2025-09-05-plc.md
+++ b/my-blog/content/posts/2025-09-05-plc.md
@@ -30,7 +30,7 @@ $ goat plc update did:plc:vzsvtbtbnwn22xjqhcu3vd6y \
   --atproto-key did:key:zQ3shZj81oA4A9CmUQgYUv97nFdd7m5qNaRMyG16XZixytTmQ > plc_operation_syui.json
 
 # もしミスった時は前の操作を無効化して再実行
-goat plc update did:plc:vzsvtbtbnwn22xjqhcu3vd6y \
+$ goat plc update did:plc:vzsvtbtbnwn22xjqhcu3vd6y \
   --handle syui.syui.ai \
   --pds https://syu.is \
   --atproto-key did:key:zQ3shZj81oA4A9CmUQgYUv97nFdd7m5qNaRMyG16XZixytTmQ \