diff --git a/irrep.jl b/irrep.jl
index 7ab53d1..b4ddfae 100644
--- a/irrep.jl
+++ b/irrep.jl
@@ -1,5 +1,5 @@
 using DelimitedFiles
-rotations = readdlm("rotations.csv", ',', Int, '\n')
+rotations = readdlm("rotations.mat", ',', Int, '\n')
 rotations = reshape(rotations, (24, 3, 3))
 
 N = 24
diff --git a/rotations.csv b/rotations.mat
similarity index 100%
rename from rotations.csv
rename to rotations.mat