diff --git a/bpx/__init__.py b/bpx/__init__.py
index c7e2ca2..e7e8dd0 100644
--- a/bpx/__init__.py
+++ b/bpx/__init__.py
@@ -5,7 +5,7 @@
 from .schema import BPX, check_sto_limits
 from .utilities import get_electrode_concentrations, get_electrode_stoichiometries
 
-__version__ = "0.5.0"
+__version__ = "1.1.0"
 
 __all__ = [
     "BPX",
diff --git a/bpx/expression_parser.py b/bpx/expression_parser.py
index ceb7ff3..5ef323f 100644
--- a/bpx/expression_parser.py
+++ b/bpx/expression_parser.py
@@ -64,4 +64,4 @@ def push_unary_minus(self, toks: tuple) -> None:
 
     def parse_string(self, model_str: str, *, parse_all: bool = True) -> None:
         self.expr_stack = []
-        self.parser.parseString(model_str, parseAll=parse_all)
+        self.parser.parse_string(model_str, parse_all=parse_all)
diff --git a/bpx/schema.py b/bpx/schema.py
index 24c4943..2c6e968 100644
--- a/bpx/schema.py
+++ b/bpx/schema.py
@@ -687,8 +687,8 @@ class State(ExtraBaseModel):
         alias="Initial conditions",
     )
 
-    thermal_state: ThermalState = Field(
-        alias="Thermal state",
+    thermal_environment: ThermalState = Field(
+        alias="Thermal environment",
     )
 
     degradation: Degradation = Field(
diff --git a/tests/test_parsers.py b/tests/test_parsers.py
index 175a3fa..2b9dabc 100644
--- a/tests/test_parsers.py
+++ b/tests/test_parsers.py
@@ -96,7 +96,7 @@ def setUp(self) -> None:
                                 "Initial hysteresis state: Negative electrode": 5,
                                 "Initial hysteresis state: Positive electrode": 10
                             },
-                            "Thermal state": {
+                            "Thermal environment": {
                                 "Ambient temperature [K]": 299,
                                 "Heat transfer coefficient [W.m-2.K-1]": 10.0
                                 }
diff --git a/tests/test_schema.py b/tests/test_schema.py
index 31233ce..64d8dc0 100644
--- a/tests/test_schema.py
+++ b/tests/test_schema.py
@@ -94,7 +94,7 @@ def setUp(self) -> None:
                         "Secondary": 10,
                     },
                 },
-                "Thermal state": {
+                "Thermal environment": {
                     "Ambient temperature [K]": 299,
                     "Heat transfer coefficient [W.m-2.K-1]": 10.0,
                 },
@@ -166,7 +166,7 @@ def setUp(self) -> None:
                     },
                     "Initial hysteresis state: Negative electrode": 5,
                 },
-                "Thermal state": {
+                "Thermal environment": {
                     "Ambient temperature [K]": 299,
                     "Heat transfer coefficient [W.m-2.K-1]": 10.0,
                 },
@@ -232,7 +232,7 @@ def setUp(self) -> None:
                     "Initial hysteresis state: Positive electrode": 10,
                     "Initial hysteresis state: Negative electrode": 5,
                 },
-                "Thermal state": {
+                "Thermal environment": {
                     "Ambient temperature [K]": 299,
                     "Heat transfer coefficient [W.m-2.K-1]": 10.0,
                 },
diff --git a/tests/test_utilities.py b/tests/test_utilities.py
index 8715415..58a532e 100644
--- a/tests/test_utilities.py
+++ b/tests/test_utilities.py
@@ -74,7 +74,7 @@ def setUp(self) -> None:
                     "Initial hysteresis state: Negative electrode": 5,
                     "Initial hysteresis state: Positive electrode": 10,
                 },
-                "Thermal state": {
+                "Thermal environment": {
                     "Ambient temperature [K]": 299,
                     "Heat transfer coefficient [W.m-2.K-1]": 10.0,
                 },