diff --git a/castai/resource_node_template.go b/castai/resource_node_template.go
index 1cb4771d..9e985432 100644
--- a/castai/resource_node_template.go
+++ b/castai/resource_node_template.go
@@ -1033,8 +1033,8 @@ func toTemplateConstraints(d *schema.ResourceData, obj map[string]any) *sdk.Node
 	}
 
 	out := &sdk.NodetemplatesV1TemplateConstraints{}
-	// todo: replace with tri-state enum
-	if v, exists := d.GetOk(FieldNodeTemplateConstraints + "." + FieldNodeTemplateComputeOptimized); exists {
+	// todo: replace with tri-state enum as GetOkExists is deprecated
+	if v, exists := d.GetOkExists(FieldNodeTemplateConstraints + ".0." + FieldNodeTemplateComputeOptimized); exists {
 		out.ComputeOptimized = toPtr(v.(bool))
 	}
 	if v, ok := obj[FieldNodeTemplateFallbackRestoreRateSeconds].(int); ok {
@@ -1074,8 +1074,8 @@ func toTemplateConstraints(d *schema.ResourceData, obj map[string]any) *sdk.Node
 			out.Spot = toPtr(!v)
 		}
 	}
-	// todo: replace with tri-state enum
-	if v, exists := d.GetOk(FieldNodeTemplateConstraints + "." + FieldNodeTemplateStorageOptimized); exists {
+	// todo: replace with tri-state enum as GetOkExists is deprecated
+	if v, exists := d.GetOkExists(FieldNodeTemplateConstraints + ".0." + FieldNodeTemplateStorageOptimized); exists {
 		out.StorageOptimized = toPtr(v.(bool))
 	}
 	if v, ok := obj[FieldNodeTemplateUseSpotFallbacks].(bool); ok {
diff --git a/castai/resource_node_template_test.go b/castai/resource_node_template_test.go
index 98adec82..315cafa4 100644
--- a/castai/resource_node_template_test.go
+++ b/castai/resource_node_template_test.go
@@ -405,7 +405,7 @@ func TestToTemplateConstraints_HandleTriStateValuesForStorageAndComputeOptimized
 		val        cty.Value
 		assertions func(*require.Assertions, *sdk.NodetemplatesV1TemplateConstraints)
 	}{
-		"all values empty except one": {
+		"all values nil": {
 			val: cty.ObjectVal(map[string]cty.Value{
 				FieldNodeTemplateConstraints: cty.ListVal([]cty.Value{
 					cty.ObjectVal(map[string]cty.Value{
@@ -419,6 +419,24 @@ func TestToTemplateConstraints_HandleTriStateValuesForStorageAndComputeOptimized
 				r.Nil(constraints.StorageOptimized)
 			},
 		},
+		"values are true/false": {
+			val: cty.ObjectVal(map[string]cty.Value{
+				FieldNodeTemplateConstraints: cty.ListVal([]cty.Value{
+					cty.ObjectVal(map[string]cty.Value{
+						FieldNodeTemplateMaxCpu:           cty.NumberIntVal(100),
+						FieldNodeTemplateStorageOptimized: cty.True,
+						FieldNodeTemplateComputeOptimized: cty.False,
+					}),
+				}),
+			}),
+			assertions: func(r *require.Assertions, constraints *sdk.NodetemplatesV1TemplateConstraints) {
+				r.NotNil(constraints)
+				r.NotNil(constraints.ComputeOptimized)
+				r.NotNil(constraints.StorageOptimized)
+				r.True(lo.FromPtr(constraints.StorageOptimized))
+				r.False(lo.FromPtr(constraints.ComputeOptimized))
+			},
+		},
 	}
 
 	for name, td := range tests {