diff --git a/octopus_energy/mappers.py b/octopus_energy/mappers.py
index 1350eca..52babae 100644
--- a/octopus_energy/mappers.py
+++ b/octopus_energy/mappers.py
@@ -159,8 +159,8 @@ def tariff_rates_from_response(response: dict) -> List[TariffRate]:
         return []
     return [
         TariffRate(
-            Decimal(result["value_exc_vat"]).quantize(_QUANT_3DP, rounding=ROUND_DOWN),
             Decimal(result["value_inc_vat"]).quantize(_QUANT_3DP, rounding=ROUND_DOWN),
+            Decimal(result["value_exc_vat"]).quantize(_QUANT_3DP, rounding=ROUND_DOWN),
             from_timestamp_str(result["valid_from"]),
             from_timestamp_str(result.get("valid_to", None)),
         )
diff --git a/pyproject.toml b/pyproject.toml
index 853f376..e0ae039 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "octopus-energy"
-version = "0.1.12"
+version = "0.1.13"
 description = "Python client for the Octopus Energy RESTful API"
 authors = ["Mark Allanson <mark@allanson.org>"]
 license = "MIT"
diff --git a/tests/mapping_results/tariff_rate_mapping.json b/tests/mapping_results/tariff_rate_mapping.json
index 0a7dae9..76dd82b 100644
--- a/tests/mapping_results/tariff_rate_mapping.json
+++ b/tests/mapping_results/tariff_rate_mapping.json
@@ -8,7 +8,7 @@
         },
         {
           "py/tuple": [
-            "20.640"
+            "21.672"
           ]
         }
       ]
@@ -20,7 +20,7 @@
         },
         {
           "py/tuple": [
-            "21.672"
+            "20.640"
           ]
         }
       ]
@@ -74,7 +74,7 @@
         },
         {
           "py/tuple": [
-            "18.460"
+            "19.382"
           ]
         }
       ]
@@ -86,7 +86,7 @@
         },
         {
           "py/tuple": [
-            "19.382"
+            "18.460"
           ]
         }
       ]
@@ -129,7 +129,7 @@
         },
         {
           "py/tuple": [
-            "18.460"
+            "19.382"
           ]
         }
       ]
@@ -141,7 +141,7 @@
         },
         {
           "py/tuple": [
-            "19.382"
+            "18.460"
           ]
         }
       ]
@@ -184,7 +184,7 @@
         },
         {
           "py/tuple": [
-            "18.460"
+            "19.382"
           ]
         }
       ]
@@ -196,7 +196,7 @@
         },
         {
           "py/tuple": [
-            "19.382"
+            "18.460"
           ]
         }
       ]
@@ -239,7 +239,7 @@
         },
         {
           "py/tuple": [
-            "18.000"
+            "18.899"
           ]
         }
       ]
@@ -251,7 +251,7 @@
         },
         {
           "py/tuple": [
-            "18.899"
+            "18.000"
           ]
         }
       ]