diff --git a/passerelle_imio_tax_compute/views.py b/passerelle_imio_tax_compute/views.py
index 380ad92..17a2ff1 100644
--- a/passerelle_imio_tax_compute/views.py
+++ b/passerelle_imio_tax_compute/views.py
@@ -14,8 +14,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import requests
-import unicodedata
+
+import json
 
 from django.views.generic.detail import SingleObjectMixin, DetailView
 from django.views.generic.edit import CreateView, UpdateView, DeleteView
@@ -28,6 +28,7 @@ from passerelle import utils
 from .models import ImioTsTaxCompute
 from .forms import ImioTsTaxComputeForm
 
+
 class SigCreateView(CreateView):
     model = ImioTsTaxCompute
     form_class = ImioTsTaxComputeForm
@@ -54,5 +55,15 @@ class EvalView(View, SingleObjectMixin):
     model = ImioTsTaxCompute
 
     def get(self, request, *args, **kwargs):
-        result = eval(self.get_object().formule)
+        return self.post(request, *args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        data = dict([(x, request.GET[x]) for x in request.GET.keys()])
+        if request.body:
+            payload = json.loads(request.body)
+            data.update(payload.get("fields"))
+        expression = self.get_object().formule
+        code_object = compile(expression, "<string>", "exec")
+        eval(code_object, data)
+        result = data.get("result")
         return utils.response_for_json(request, {'data': result})