From the terminal: Run flutter pub get . From Android Studio/IntelliJ: Click Packages get in the action ribbon at the top of pubspec. yaml . From VS Code: Click Get Packages located in right side of the action ribbon at the top of pubspec.
Read moreHow do I update a pub package?
First, comment that the packaging line in the pubspec. yaml file and run flutter pub get after successfully get packages to uncomment that line (if you want to upgrade/downgrade to a specific version that mentioned version too) it will upgrade to the latest version.
Read more