diff --git a/conclusion.tex b/conclusion.tex
index a527fa0..2e9d360 100644
--- a/conclusion.tex
+++ b/conclusion.tex
@@ -8,7 +8,7 @@ development time and for that uncertainty to be resolved through later
 testing and adaptation. We are in the process of building a prototype of the
 \texttt{maybe} system for Android smartphones.
 
-\subsubsection*{Acknowledgements}
+\subsubsection*{Acknowledgments}
 
 Students and faculty working on the \texttt{maybe} project are supported by
 NSF awards