diff --git a/src/CAS_SD/EZFIO.cfg b/src/CAS_SD/EZFIO.cfg
new file mode 100644
index 00000000..5629e90b
--- /dev/null
+++ b/src/CAS_SD/EZFIO.cfg
@@ -0,0 +1,36 @@
+[N_det_max_cas_sd]
+type: Det_number_max
+doc: Max number of determinants in the wave function
+interface: input
+default: 10000
+
+[do_pt2_end]
+type: logical
+doc: If true, compute the PT2 at the end of the selection
+interface: input
+default: true
+
+[PT2_max]
+type: PT2_energy
+doc: The selection process stops when the largest PT2 (for all the state is lower
+     than pt2_max in absolute value
+interface: input
+default: 0.0001
+
+[var_pt2_ratio]
+type: Normalized_float
+doc: The selection process stops when the energy ratio variational/(variational+PT2)
+     is equal to var_pt2_ratio
+interface: input
+default: 0.75
+
+[energy]
+type: double precision
+doc: "Calculated CAS-SD energy"
+interface: output
+
+[energy_pt2]
+type: double precision
+doc: "Calculated selected CAS-SD energy with PT2 correction"
+interface: output
+