diff --git a/Makefile b/Makefile
index 4c233c3a3..e8a0abbc8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 all: authors.tex pprint.pdf paper.pdf supplement.pdf rebuttal.pdf
 
-paper.pdf: paper.tex authors.tex introduction.tex architecture.tex features.tex assumptions.tex basic_usage.tex numerics.tex domain_specific.tex projects_that_depend_on_sympy.tex conclusion_and_future_work.tex acknowledgements.tex siamart0216_uppercase_fix.tex pprint.pdf pprint.tex printers.tex calculus.tex matrices.tex solvers.tex images/circuitplot-qft.pdf paper.bib
+paper.pdf: paper.tex authors.tex introduction.tex architecture.tex features.tex assumptions.tex basic_usage.tex numerics.tex domain_specific.tex projects_that_depend_on_sympy.tex conclusion_and_future_work.tex siamart0216_uppercase_fix.tex pprint.pdf pprint.tex printers.tex calculus.tex matrices.tex solvers.tex images/circuitplot-qft.pdf paper.bib
 	pdflatex -shell-escape --halt-on-error paper.tex
 	bibtex paper.aux
 	pdflatex -shell-escape --halt-on-error paper.tex
diff --git a/acknowledgements.tex b/acknowledgements.tex
deleted file mode 100644
index 3253e9740..000000000
--- a/acknowledgements.tex
+++ /dev/null
@@ -1,14 +0,0 @@
-% People should add their funding agency acknowledgements here.
-All authors thank the Google Summer of Code for its financial support of
-students who contributed to SymPy.
-
-The author of this paper Ondřej Čertík thanks the Los Alamos National
-Laboratory for its financial support.
-
-The author of this paper Richard P. Muller thanks Sandia National Laboratories
-for their financial support.
-
-The author of this paper Francesco Bonazzi thanks the Deutsche
-Forschungsgemeinschaft (DFG) for its financial support via the International
-Research Training Group 1524 ``Self-Assembled Soft Matter Nano-Structures at
-Interfaces.''
diff --git a/paper.tex b/paper.tex
index 68a1eea4e..04dec30a5 100644
--- a/paper.tex
+++ b/paper.tex
@@ -124,11 +124,6 @@ \section{Conclusion and Future Work}
 
 \input{conclusion_and_future_work}
 
-\section{Acknowledgements}
-\label{sec:acknowledgements}
-
-\input{acknowledgements}
-
 \bibliography{paper}
 
 \end{document}
diff --git a/rebuttal.tex b/rebuttal.tex
index 1b0893d95..6473e3fcb 100644
--- a/rebuttal.tex
+++ b/rebuttal.tex
@@ -1,7 +1,6 @@
 \documentclass[answers,12pt]{exam}
 \usepackage{xcolor}
 
-\usepackage{xr-hyper}
 \usepackage{xr}
 \externaldocument[P-]{paper}