diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca17432a0c..b780c84da4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+
+## 13.1.5
+
+* Fix 2017 rates and test them:
+  - réduction générale sur les bas salaires (fillon) had a minor difference (we used the 2016 provisionnal value)
+  - maladie MMID employeur had not been updated
+
 ## 13.1.4
 
 * Fix AGS value in cotsoc.xml. v10.0.1's fix was ineffective.
diff --git a/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/allegements.py b/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/allegements.py
index 3b6737663d..18bac81873 100644
--- a/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/allegements.py
+++ b/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/allegements.py
@@ -301,6 +301,7 @@ class allegement_fillon(DatedVariable):
     column = FloatCol
     entity = Individu
     label = u"Allègement de charges employeur sur les bas et moyens salaires (dit allègement Fillon)"
+    url = u"https://www.service-public.fr/professionnels-entreprises/vosdroits/F24542"
 
     # Attention : cet allègement a des règles de cumul spécifiques
 
@@ -327,7 +328,7 @@ def function(self, simulation, period):
 def compute_allegement_fillon(simulation, period):
     """
         Exonération Fillon
-        http://www.securite-sociale.fr/comprendre/dossiers/exocotisations/exoenvigueur/fillon.htm
+        https://www.service-public.fr/professionnels-entreprises/vosdroits/F24542
     """
     assiette = simulation.calculate_add('assiette_allegement', period)
     smic_proratise = simulation.calculate_add('smic_proratise', period)
diff --git a/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/travail_prive.py b/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/travail_prive.py
index c9964c3d9a..d9a1f18afc 100644
--- a/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/travail_prive.py
+++ b/openfisca_france/model/prelevements_obligatoires/prelevements_sociaux/cotisations_sociales/travail_prive.py
@@ -587,6 +587,7 @@ class mmid_employeur(Variable):
     column = FloatCol
     entity = Individu
     label = u"Cotisation maladie (employeur)"
+    url = u"https://www.urssaf.fr/portail/home/employeur/calculer-les-cotisations/les-taux-de-cotisations/la-cotisation-maladie---maternit.html"
 
     def function(self, simulation, period):
         period = period.start.period(u'month').offset('first-of')
diff --git a/openfisca_france/param/param.xml b/openfisca_france/param/param.xml
index d6cdb22db2..096018409a 100644
--- a/openfisca_france/param/param.xml
+++ b/openfisca_france/param/param.xml
@@ -939,15 +939,15 @@
           <VALUE deb="2005-07-01" fin="2016-12-31" valeur="1.6" />
         </CODE>
         <CODE code="tx_max" description="Taux maximum (plus de 20 salariés)" format="percent">
-          <VALUE deb="2018-01-01" fuzzy="true" valeur=".2850" />
-          <VALUE deb="2017-01-01" fin="2017-12-31" valeur=".2850" />
+          <VALUE deb="2018-01-01" fuzzy="true" valeur=".2849" />
+          <VALUE deb="2017-01-01" fin="2017-12-31" valeur=".2849" />
           <VALUE deb="2016-01-01" fin="2016-12-31" valeur=".2842" />
           <VALUE deb="2015-01-01" fin="2015-12-31" valeur=".2835" />
           <VALUE deb="2005-07-01" fin="2014-12-31" valeur=".26" />
         </CODE>
         <CODE code="tx_max2" description="Taux maximum (moins de 20 salariés)" format="percent">
-          <VALUE deb="2018-01-01" fuzzy="true" valeur=".2810" />
-          <VALUE deb="2017-01-01" fin="2017-12-31" valeur=".2810" />
+          <VALUE deb="2018-01-01" fuzzy="true" valeur=".2809" />
+          <VALUE deb="2017-01-01" fin="2017-12-31" valeur=".2809" />
           <VALUE deb="2016-01-01" fin="2016-12-31" valeur=".2802" />
           <VALUE deb="2015-01-01" fin="2015-12-31" valeur=".2795" />
           <VALUE deb="2007-07-01" fin="2014-12-31" valeur=".281" />
@@ -1579,7 +1579,7 @@
               <VALUE deb="1992-07-01" fin="2014-12-31" valeur="0" />
             </SEUIL>
             <TAUX>
-              <VALUE deb="2017-01-01" fuzzy="true" valeur="0.1284" />
+              <VALUE deb="2017-01-01" fuzzy="true" valeur="0.1289" />
               <VALUE deb="2016-01-01" fin="2016-12-31" valeur="0.1284" />
               <VALUE deb="1992-07-01" fin="2015-12-31" valeur="0.128" />
             </TAUX>
diff --git a/openfisca_france/parameters/cotsoc.xml b/openfisca_france/parameters/cotsoc.xml
index 3f6b53be0d..27fdcc2b43 100644
--- a/openfisca_france/parameters/cotsoc.xml
+++ b/openfisca_france/parameters/cotsoc.xml
@@ -738,7 +738,7 @@
             <VALUE deb="1992-07-01" fin="2014-12-31" valeur="0" />
           </SEUIL>
           <TAUX>
-            <VALUE deb="2017-01-01" fuzzy="true" valeur="0.1284" />
+            <VALUE deb="2017-01-01" fuzzy="true" valeur="0.1289" />
             <VALUE deb="2016-01-01" fin="2016-12-31" valeur="0.1284" />
             <VALUE deb="1992-07-01" fin="2015-12-31" valeur="0.128" />
           </TAUX>
diff --git a/openfisca_france/parameters/prelevements_sociaux.xml b/openfisca_france/parameters/prelevements_sociaux.xml
index 19dfb4d2c3..3ff6033bcf 100644
--- a/openfisca_france/parameters/prelevements_sociaux.xml
+++ b/openfisca_france/parameters/prelevements_sociaux.xml
@@ -2215,7 +2215,8 @@
             <VALUE deb="1967-10-01" fuzzy="true" valeur="0" />
           </SEUIL>
           <TAUX>
-            <VALUE deb="2016-01-01" fuzzy="true" valeur="0.1284" />
+            <VALUE deb="2017-01-01" fuzzy="true" valeur="0.1289" />
+            <VALUE deb="2016-01-01" fin="2016-12-31" valeur="0.1284" />
             <VALUE deb="1992-01-01" fin="2015-12-31" valeur="0.128" />
             <VALUE deb="1984-01-01" fin="1991-12-31" valeur="0.126" />
             <VALUE deb="1981-11-01" fin="1983-12-31" valeur="0.08" />
@@ -2529,13 +2530,13 @@
       </CODE>
       <NODE code="reduction_maximale" origin="ipp">
         <CODE code="entreprises_de_20_salaries_et_plus" origin="ipp">
-          <VALUE deb="2017-01-01" fuzzy="true" valeur="0.2847" />
+          <VALUE deb="2017-01-01" fuzzy="true" valeur="0.2849" />
           <VALUE deb="2016-01-01" fin="2016-12-31" valeur="0.2842" />
           <VALUE deb="2015-01-01" fin="2015-12-31" valeur="0.2835" />
           <VALUE deb="2005-07-01" fin="2014-12-31" valeur="0.26" />
         </CODE>
         <CODE code="entreprises_de_moins_de_20_salaries" origin="ipp">
-          <VALUE deb="2017-01-01" fuzzy="true" valeur="0.2807" />
+          <VALUE deb="2017-01-01" fuzzy="true" valeur="0.2809" />
           <VALUE deb="2016-01-01" fin="2016-12-31" valeur="0.2802" />
           <VALUE deb="2015-01-01" fin="2015-12-31" valeur="0.2795" />
           <VALUE deb="2007-07-01" fin="2014-12-31" valeur="0.281" />
diff --git a/openfisca_france/tests/formulas/maladie_mmid_employeur.yaml b/openfisca_france/tests/formulas/maladie_mmid_employeur.yaml
new file mode 100644
index 0000000000..1d2c0c6db6
--- /dev/null
+++ b/openfisca_france/tests/formulas/maladie_mmid_employeur.yaml
@@ -0,0 +1,8 @@
+- period: "2017-02"
+  name:
+    Cotisation maladie MMID employeur
+  relative_error_margin: 0.001
+  input_variables:
+    salaire_de_base: 2300
+  output_variables:
+    mmid_employeur: -.1289 * 2300
diff --git a/openfisca_france/tests/formulas/reduction_generale-fillon.yaml b/openfisca_france/tests/formulas/reduction_generale-fillon.yaml
new file mode 100644
index 0000000000..0c22c533b7
--- /dev/null
+++ b/openfisca_france/tests/formulas/reduction_generale-fillon.yaml
@@ -0,0 +1,15 @@
+- period: "2017-01"
+  name: Base
+  relative_error_margin: 0.001
+  input_variables:
+    allegement_fillon_mode_recouvrement: 1
+    effectif_entreprise: 1
+    salaire_de_base: 1500
+  output_variables:
+    allegement_fillon: >
+      1500 *
+      (
+        (.2809 / .6)
+        *
+        (1.6 * ( 17763.20 / (1500 * 12)) - 1)
+      )
diff --git a/setup.py b/setup.py
index 69671707ac..e55fdd5982 100755
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setup(
     name = 'OpenFisca-France',
-    version = '13.1.4',
+    version = '13.1.5',
     author = 'OpenFisca Team',
     author_email = 'contact@openfisca.fr',
     classifiers = [