How to fix How to fix 'installed different version than requested' in pip in Python

PythonINTERMEDIATEMEDIUMUpdated Dec 7, 2025· 124 views

pip installed a different version of a package than you requested. This usually happens due to version constraints or conflicts that force using an alternative version.

Quick fix

Fixes How to fix 'installed different version than requested' in pip

  1. Verify the root cause
  2. Apply the appropriate fix
  3. Retry the installation
python — error
# How to fix 'installed different version than requested' in pip

What this error means

When multiple packages have conflicting version requirements for the same dependency, pip must choose a version that works for all. Sometimes this means installing a version that isn't your first choice, but which satisfies all constraints.

Typical symptoms

  • pip installs version X when you requested Y
  • pip explains why different version was chosen
  • Downgrading one package upgrades another
  • requirements.txt specifies version but different installed
  • pip shows resolution explanation
  • Happens with complex dependency trees
  • Works but not with desired versions

Common causes

  1. Version constraint forces use of different version
  2. Transitive dependencies require older version
  3. Package yanked from PyPI forces fallback
  4. Python version requires older package version
  5. Another package pins conflicting version
  6. Pip's resolver chooses optimal version that's not first choice

How to fix this error

1Verify the root cause

Review the error message above and identify which cause applies to your situation. Run additional diagnostics if needed.

2Apply the appropriate fix

Follow the corresponding solution from the causes section above.

3Retry the installation

Once you've addressed the root cause, try running 'pip install' again.

Frequently asked questions

What does "How to fix 'installed different version than requested' in pip" mean?
When multiple packages have conflicting version requirements for the same dependency, pip must choose a version that works for all. Sometimes this means installing a version that isn't your first choice, but which satisfies all constraints.
How do I fix "How to fix 'installed different version than requested' in pip"?
pip installed a different version of a package than you requested. This usually happens due to version constraints or conflicts that force using an alternative version.
What causes "How to fix 'installed different version than requested' in pip"?
Version constraint forces use of different version Transitive dependencies require older version Package yanked from PyPI forces fallback
Is the "How to fix 'installed different version than requested' in pip" error serious?
It is a medium-severity error — more of a blocker than a risk. The steps above resolve it.

Official resources & further reading