diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index d246eb9..025f393 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,10 +1,20 @@
 Release Notes
 =============
 
+v1.0.0-alpha.x
+--------------
+
+### Bug fixes
+
+- Bumped `pyyaml` version to `6.0.0` to avoid issues with `cython` 3+,
+  and `conan` `1.60.1` to be compatible with `pyyaml` `6.0.0`.
+  [pyyaml/#601](https://github.com/yaml/pyyaml/issues/601)
+
 v1.0.0-alpha.6
 --------------
 
 ### Improvements
+
 - Removed dependence on `TraitsBase` and `SpecificationBase` types in
   generated python code, rather generating the functionality previously
   provided by the base directly into the traits and specifications. This
@@ -12,7 +22,6 @@ v1.0.0-alpha.6
   dependency on OpenAssetIO.
   [#19](https://github.com/OpenAssetIO/OpenAssetIO-TraitGen/issues/19)
 
-
 v1.0.0-alpha.5
 --------------
 
@@ -29,7 +38,6 @@ v1.0.0-alpha.5
 - Fixed line breaks to no longer be platform-specific, and instead
   conform to Unix-style `\n`.
 
-
 v1.0.0-alpha.4
 --------------
 
diff --git a/requirements.txt b/requirements.txt
index 368ba4f..ec0a531 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@
 # This allows them to be collected/installed prior to build if
 # required.
 jinja2==3.1.2
-pyyaml==5.4.1
+pyyaml==6.0.0  # We are currently constrained to pyyaml=6.0.0 exactly due to conan 1.60.1
 jsonschema==4.7.2
diff --git a/setup.py b/setup.py
index 59d8047..6eb1ec0 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,8 @@
     packages=find_packages(where="python"),
     package_dir={"": "python"},
     include_package_data=True,
-    install_requires=["jinja2==3.1.2", "pyyaml==5.4.1", "jsonschema==4.7.2"],
+    # We are currently constrained to pyyaml=6.0.0 exactly due to conan 1.60.1
+    install_requires=["jinja2==3.1.2", "pyyaml==6.0.0", "jsonschema==4.7.2"],
     entry_points={
         "console_scripts": ["openassetio-traitgen=openassetio_traitgen.__main__:main"],
     },
diff --git a/tests/ctest-requirements.txt b/tests/ctest-requirements.txt
index b38146b..ce9fb42 100644
--- a/tests/ctest-requirements.txt
+++ b/tests/ctest-requirements.txt
@@ -1,5 +1,5 @@
 cmake==3.25.2  # Configure/build C++ tests
-conan==1.59  # Install dependencies for C++ tests.
+conan==1.60.1  # Install dependencies for C++ tests.
 cmakelang==0.6.13  # Lint CMake
 cpplint==1.6.1  # Basic linting of C++ files.
 clang-tidy==15.0.2.1  # Static analysis of C++ files
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 3abb18c..2565a22 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,5 +1,5 @@
 pytest==6.2.4
-pyyaml==5.4.1
+pyyaml==6.0.0  # We are currently constrained to pyyaml=6.0.0 exactly due to conan 1.60.1
 pylint==2.15.5  # Guard against warn/error changes
 jsonschema==4.7.2
 tree-sitter==0.20.1  # For parsing C++ AST to assert on comment text.