diff --git a/README.md b/README.md
index 60e4da8..d49d6a5 100644
--- a/README.md
+++ b/README.md
@@ -139,4 +139,5 @@ spellbook my-spell target=127.0.0.1
 - Namespaces
 
 ## Known issues
-- `KEY=VAL my-cmd` inline environment variable syntax is currently not supported (will fail with `executable file not found in $PATH`)
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+- `KEY=VAL my-cmd` inline environment variable syntax is currently not supported (will fail with `executable file not found in $PATH`)
+- Shell operators (such as `|`, `>>`, etc.) are not yet supported
\ No newline at end of file