diff --git a/Project.toml b/Project.toml
index 939ab2e..8b83ae5 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,6 +18,7 @@ UnicodePlots = "b8865327-cd53-5732-bb35-84acbb429228"
 [compat]
 FFTW = "1"
 GDAL = "1"
+GMT = "0.41"
 SeisIO = "1"
 UnicodePlots = "2"
 julia = "1"