pip-tools: Not able to upgrade version for transitive Dependency

I hope this is correct forum for this issue.

Environment Versions

1. OS Type - macOS
2. Python version: $ python -V - 3.8
3. pip version: $ pip --version - 24.0
4. pip-tools version: $ pip-compile --version - 2.0.2

Steps to replicate

1. I’ve two files requirements.in listing all dependencies and versions, and another is requirements.txt which is created after compiling requirements.in and is used to install dependencies.
2. certifi version is 2021.10.8 and mentioned in requirements.txt file. I am trying to upgrade the transitive dependencies like sentry, requests, etc in requirements.in file and but the certifi version is not changing in requirements.txt and virtual env.
3. Similarly, tornado is dependent on flower. After upgrading flower version in requirements.in file, running pip-compile and pip install does not change version for tornado in requirements.txt file.

I am not sure what steps or process I am missing here. I have tried using force cmd, cleared cache, re-installed virtual env. I appreciate the help, Thanks.

Expected result

Lib version should get changed in requirements.txt.

Actual result

Lib versions are still old ones.