diff --git a/docs/Project.toml b/docs/Project.toml
index d51bc58119..eaedec4c6c 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -54,4 +54,5 @@ GeometryOps = {path = ".."}
 GeometryOpsCore = {path = "../GeometryOpsCore"}
 
 [compat]
+CoordinateTransformations = "0.6.4"
 DocumenterVitepress = ">=0.2.1"
diff --git a/test/Project.toml b/test/Project.toml
index 1f235391d5..a435b837e0 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -38,6 +38,7 @@ XML = "72c71f33-b9b6-44de-8c94-c961784809e2"
 
 [compat]
 ArchGDAL = "0.10.10"
+CoordinateTransformations = "0.6.4"
 GeometryBasics = "0.4.7, 0.5"
 Test = "1"