diff --git a/scripts/ezfio_interface/ei_handler.py b/scripts/ezfio_interface/ei_handler.py
index 91682f9e..a02b13d5 100755
--- a/scripts/ezfio_interface/ei_handler.py
+++ b/scripts/ezfio_interface/ei_handler.py
@@ -70,9 +70,9 @@ def is_bool(str_):
     Take a string, if is a bool return the conversion into
         fortran and ocaml.
     """
-    if str_.lower() in ['true', '.true.']:
+    if "true" in str_.lower():
         return Type(None, "true", ".True.")
-    elif str_.lower() in ['false', '.false.']:
+    elif "false" in str_.lower():
         return Type(None, "false", ".False")
     else:
         raise TypeError
diff --git a/src/CAS_SD/EZFIO.cfg b/src/CAS_SD/EZFIO.cfg
index 5629e90b..7f27f95a 100644
--- a/src/CAS_SD/EZFIO.cfg
+++ b/src/CAS_SD/EZFIO.cfg
@@ -8,7 +8,7 @@ default: 10000
 type: logical
 doc: If true, compute the PT2 at the end of the selection
 interface: input
-default: true
+default: True
 
 [PT2_max]
 type: PT2_energy
diff --git a/src/CISD_SC2_selected/EZFIO.cfg b/src/CISD_SC2_selected/EZFIO.cfg
index a97e2d76..b76eac5d 100644
--- a/src/CISD_SC2_selected/EZFIO.cfg
+++ b/src/CISD_SC2_selected/EZFIO.cfg
@@ -8,7 +8,7 @@ default: 10000
 type: logical
 doc: If true, compute the PT2 at the end of the selection
 interface: input
-default: true
+default: True
 
 [PT2_max]
 type: PT2_energy
diff --git a/src/Full_CI/EZFIO.cfg b/src/Full_CI/EZFIO.cfg
index f59e094f..89679d1a 100644
--- a/src/Full_CI/EZFIO.cfg
+++ b/src/Full_CI/EZFIO.cfg
@@ -14,7 +14,7 @@ default: 10000
 type: logical
 doc: If true, compute the PT2 at the end of the selection
 interface: input
-default: true
+default: True
 
 [PT2_max]
 type: PT2_energy