diff --git a/README.md b/README.md
index 0531bc8..e9fd4ea 100644
--- a/README.md
+++ b/README.md
@@ -106,6 +106,12 @@ pathdebug SOME_PATH -o table
 
 see help for other formats
 
+## Limitations
+
+- finding the sources where the PATH variable entries are set is best-effort
+- path set by executables currently not tracked as sources
+- CSV output may lag in output completeness
+
 ## License
 
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