diff --git a/usecases/arxiv-paper-reader.md b/usecases/arxiv-paper-reader.md
index 2b667c4..ab95d9a 100644
--- a/usecases/arxiv-paper-reader.md
+++ b/usecases/arxiv-paper-reader.md
@@ -22,7 +22,7 @@ This workflow turns your agent into a research reading assistant:
 docker compose -f docker/docker-compose.dev.yml up
 ```
 
-2. The `arxiv-reader` skill is builtin — no installation needed. Prompt OpenClaw:
+2. The `arxiv-reader` skill is built-in — no installation needed. Prompt OpenClaw:
 ```text
 I'm researching [topic]. Here's my workflow:
 
diff --git a/usecases/latex-paper-writing.md b/usecases/latex-paper-writing.md
index 704e6bf..d848f93 100644
--- a/usecases/latex-paper-writing.md
+++ b/usecases/latex-paper-writing.md
@@ -22,7 +22,7 @@ This workflow turns your agent into a LaTeX writing assistant with instant compi
 docker compose -f docker/docker-compose.dev.yml up
 ```
 
-2. The `latex-compiler` skill is builtin — no installation needed. Prompt OpenClaw:
+2. The `latex-compiler` skill is built-in — no installation needed. Prompt OpenClaw:
 ```text
 Help me write a research paper in LaTeX. Here's my workflow: