# issue in dependency

**URL:** <https://discuss.flower.ai/t/issue-in-dependency/1099>\
**Category:** Flower Help - Beginners\
**Tags:** flower\
**Created:** [September 11, 2025, 10:09am UTC](https://discuss.flower.ai/t/issue-in-dependency/1099 "2025-09-11T10:09:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![amine](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@amine](https://discuss.flower.ai/u/amine)\
**Post date:** [September 11, 2025, 10:09am UTC](https://discuss.flower.ai/t/issue-in-dependency/1099/1 "2025-09-11T10:09:08Z")

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ERROR: Cannot install -r requirements\_client.txt (line 16), -r requirements\_client.txt (line 19), grpcio==1.43.0 and tensorflow-aarch64 because these package versions have conflicting dependencies.

The conflict is caused by:  
The user requested grpcio==1.43.0  
flwr 0.18.0 depends on grpcio\<=1.43.0 and \>=1.27.2  
tensorflow-aarch64 2.12.0 depends on grpcio\<2.0 and \>=1.24.3  
tensorboard 2.12.3 depends on grpcio\>=1.48.2  
The user requested grpcio==1.43.0  
flwr 0.18.0 depends on grpcio\<=1.43.0 and \>=1.27.2  
tensorflow-aarch64 2.12.0 depends on grpcio\<2.0 and \>=1.24.3  
tensorboard 2.12.2 depends on grpcio\>=1.48.2  
The user requested grpcio==1.43.0  
flwr 0.18.0 depends on grpcio\<=1.43.0 and \>=1.27.2  
tensorflow-aarch64 2.12.0 depends on grpcio\<2.0 and \>=1.24.3  
tensorboard 2.12.1 depends on grpcio\>=1.48.2  
The user requested grpcio==1.43.0  
flwr 0.18.0 depends on grpcio\<=1.43.0 and \>=1.27.2  
tensorflow-aarch64 2.12.0 depends on grpcio\<2.0 and \>=1.24.3  
tensorboard 2.12.0 depends on grpcio\>=1.48.2

To fix this you could try to:

1. loosen the range of package versions you’ve specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit [Dependency Resolution - pip documentation v25.3.dev0](https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts)

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<div class="post-metadata">

**Author:** ![javier](https://dub1.discourse-cdn.com/flex013/user_avatar/discuss.flower.ai/javier/32/116_2.png) [@javier](https://discuss.flower.ai/u/javier)\
**Post date:** [September 11, 2025, 10:11am UTC](https://discuss.flower.ai/t/issue-in-dependency/1099/2 "2025-09-11T10:11:02Z")

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Hello @amine , from the error log it seems you are installing a very old version of flower (`0.18.0`, that’s from February 2022). I would recommend moving to a newer version of Flower which is also compatible with more recent versions of popular ML packages like tensorflow.