diff --git a/examples/SpectralMethod/Polycrystal/numerics.config b/examples/SpectralMethod/Polycrystal/numerics.config
deleted file mode 100644
index 5008d45a7..000000000
--- a/examples/SpectralMethod/Polycrystal/numerics.config
+++ /dev/null
@@ -1,2 +0,0 @@
-itmin 4
-itmax 40
diff --git a/examples/SpectralMethod/Polycrystal/numerics.yaml b/examples/SpectralMethod/Polycrystal/numerics.yaml
new file mode 100644
index 000000000..1a069cb76
--- /dev/null
+++ b/examples/SpectralMethod/Polycrystal/numerics.yaml
@@ -0,0 +1,3 @@
+grid:
+  itmin: 4
+  itmax: 40