# JuMP v0.19.2 ⇒ v0.18.6

**URL:** <https://discourse.julialang.org/t/jump-v0-19-2-v0-18-6/27917>\
**Category:** Optimization (Mathematical)\
**Created:** [August 24, 2019, 12:39am UTC](https://discourse.julialang.org/t/jump-v0-19-2-v0-18-6/27917 "2019-08-24T00:39:56Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [August 24, 2019, 1:36am UTC](https://discourse.julialang.org/t/jump-v0-19-2-v0-18-6/27917/3 "2019-08-24T01:36:47Z")

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This is a unfortunate result of Pkg choosing to downgrade JuMP instead of one of the solvers you have installed.

See [https://github.com/JuliaOpt/GLPK.jl/issues/106#issuecomment-523659797](https://github.com/JuliaOpt/GLPK.jl/issues/106#issuecomment-523659797)

However. If you use Julia 1.2 at present, you will encounter the compiler hang mentioned above. The new version of JuMP will fix this, but until it’s released, we recommend you stick with Julia 1.1.

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_[View the full topic](https://discourse.julialang.org/t/jump-v0-19-2-v0-18-6/27917)._