diff --git a/G/GMT/Versions.toml b/G/GMT/Versions.toml
index 0ea8d7c8a0cff8e..5fb44c062cd9106 100644
--- a/G/GMT/Versions.toml
+++ b/G/GMT/Versions.toml
@@ -336,3 +336,6 @@ git-tree-sha1 = "a01555393cf6cf382fee1e5862ab5b4aa15ba3cb"
 
 ["1.17.0"]
 git-tree-sha1 = "b39380b3739afdb76752a7b302dac50e07ed3e4e"
+
+["1.18.0"]
+git-tree-sha1 = "24ffccd6382fae791d1d05e8a12ca94eb92391f3"