# Change Julia version for a Jupyter notebook
**URL:** https://discourse.julialang.org/t/change-julia-version-for-a-jupyter-notebook/44359
**Category:** General Usage
**Tags:** question
**Created:** [August 5, 2020, 5:52pm UTC](https://discourse.julialang.org/t/change-julia-version-for-a-jupyter-notebook/44359 "2020-08-05T17:52:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ryan\_Chan](https://discourse.julialang.org/u/Ryan_Chan)
#### Post date: [August 5, 2020, 5:52pm UTC](https://discourse.julialang.org/t/change-julia-version-for-a-jupyter-notebook/44359/1 "2020-08-05T17:52:23Z")
Hi all,
I have recently started to learn Julia and have been using JuliaAcademy. I have downloaded the latest Julia version (v1.5.0), however, the Jupyter notebooks for the courses are written in Julia 1.4.2.
This means that when I try to open these notebooks, the kernel fails to start and I do not have Julia 1.4.2. Is there a way that I can change the version of Julia of the notebook so I can run the code for these courses.
Or would I just need to download Julia 1.4.2? I would like to just have one version of Julia downloaded if possible.
(The particular course and notebooks I’m referring to are Julia for Data Science ([Data | JuliaAcademy](https://juliaacademy.com/courses/937702/lectures/17339299)))
---
### Author:  [@Ryan\_Chan](https://discourse.julialang.org/u/Ryan_Chan)
#### Post date: [August 5, 2020, 9:09pm UTC](https://discourse.julialang.org/t/change-julia-version-for-a-jupyter-notebook/44359/2 "2020-08-05T21:09:33Z")
The problem was that I had uninstalled Julia 1.4.2, but the kernel still existed. The solution is to run
```julia
jupyter kernelspec list
```
to get the list of kernels and the paths to them.
Next had to run
```julia
jupyter kernelspec uninstall unwanted-kernel
```
in order to uninstall the old kernels. In my case, remove Julia-1.4 kernel so Julia-1.5 opens by default