diff --git a/docs/concepts/llms.mdx b/docs/concepts/llms.mdx
index 10ee03683..f1d586bee 100644
--- a/docs/concepts/llms.mdx
+++ b/docs/concepts/llms.mdx
@@ -158,7 +158,11 @@ In this section, you'll find detailed examples that help you select, configure,
 
   <Accordion title="Anthropic">
     ```toml Code
+    # Required
     ANTHROPIC_API_KEY=sk-ant-...
+
+    # Optional
+    ANTHROPIC_API_BASE=<custom-base-url>
     ```
 
     Example usage in your CrewAI project: