diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ## PyFAN
 
-This python script utilizes linux's hwmon interface and a PID controller for fan controlling. No external dependencies besides simple_pid are needed.
+This python script utilizes linux's hwmon interface and a PID controller for fan controlling. No external dependencies besides simple_pid and PyYAML are needed.
 
 # Usage