diff --git a/_metadata.py b/_metadata.py
index e93f58b8..cafa3ce5 100644
--- a/_metadata.py
+++ b/_metadata.py
@@ -1,2 +1,2 @@
-__extension_version__ = "0.41.0"
+__extension_version__ = "0.42.0"
 __extension_name__ = "pytket-quantinuum"
diff --git a/docs/changelog.md b/docs/changelog.md
index 79890934..2f4381c2 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -4,6 +4,11 @@
 
 # Changelog
 
+## 0.42.0 (December 2024)
+
+- Updated pytket version requirement to 1.37.
+- Updated pytket-pecos version requirement to 0.1.32.
+
 ## 0.41.0 (November 2024)
 
 - Add optimisation level 3 that uses `GreedyPauliSimp`.
diff --git a/setup.py b/setup.py
index 5f4950f9..b9fb0e9f 100644
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,7 @@
     packages=find_namespace_packages(include=["pytket.*"]),
     include_package_data=True,
     install_requires=[
-        "pytket >= 1.35.0",
+        "pytket >= 1.37.0",
         "pytket-qir >= 0.17, < 0.18",
         "requests >= 2.32.2",
         "types-requests",
@@ -56,7 +56,7 @@
         "numpy >= 1.26.4",
     ],
     extras_require={
-        "pecos": ["pytket-pecos ~= 0.1.31"],
+        "pecos": ["pytket-pecos ~= 0.1.32"],
         "calendar": ["matplotlib >= 3.8.3,< 3.10.0", "pandas ~= 2.2.1"],
     },
     classifiers=[