<!--
title: Pin dependency versions
domain: app-frameworks
topic: CI/CD
language: Yaml
source: gin-gonic/gin
updated: 2021-08-17
url: https://awesomereviewers.com/reviewers/gin-pin-dependency-versions/
-->

Always specify exact versions of tools and dependencies in CI/CD workflows rather than using 'latest' or floating versions. This ensures build reproducibility, prevents unexpected failures when upstream dependencies change, and makes debugging easier.

Example:
```yml
# Instead of this (unstable):
- name: Setup golangci-lint
  uses: golangci/golangci-lint-action@v2
  with:
    version: latest

# Do this (stable):
- name: Setup golangci-lint
  uses: golangci/golangci-lint-action@v2
  with:
    version: v1.41.1
    args: --verbose
```

Similarly, when defining test matrices, explicitly specify all supported versions to ensure comprehensive coverage across environments.