diff --git a/scripts/update_version.py b/scripts/update_version.py
index fb9b15dd31..003edee274 100644
--- a/scripts/update_version.py
+++ b/scripts/update_version.py
@@ -30,6 +30,16 @@ def update_version():
         file.seek(0)
         file.write(replace_version)
 
+    # pyproject.toml
+    with open(os.path.join(pybamm.root_dir(), "pyproject.toml"), "r+") as file:
+        output = file.read()
+        replace_version = re.sub(
+            '(?<=version = ")(.+)(?=")', release_version, output
+        )
+        file.truncate(0)
+        file.seek(0)
+        file.write(replace_version)
+
     # CITATION.cff
     with open(os.path.join(pybamm.root_dir(), "CITATION.cff"), "r+") as file:
         output = file.read()